/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 23:43:39,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 23:43:39,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 23:43:39,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 23:43:39,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 23:43:39,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 23:43:39,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 23:43:39,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 23:43:39,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 23:43:39,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 23:43:39,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 23:43:39,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 23:43:39,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 23:43:39,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 23:43:39,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 23:43:39,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 23:43:39,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 23:43:39,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 23:43:39,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 23:43:39,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 23:43:39,218 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 23:43:39,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 23:43:39,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 23:43:39,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 23:43:39,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 23:43:39,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 23:43:39,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 23:43:39,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 23:43:39,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 23:43:39,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 23:43:39,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-18 23:43:39,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 23:43:39,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 23:43:39,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 23:43:39,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 23:43:39,256 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 23:43:39,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 23:43:39,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 23:43:39,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 23:43:39,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 23:43:39,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 23:43:39,259 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 23:43:39,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 23:43:39,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 23:43:39,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 23:43:39,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:43:39,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 23:43:39,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 23:43:39,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 23:43:39,262 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 23:43:39,262 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 23:43:39,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 23:43:39,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 23:43:39,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 23:43:39,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 23:43:39,491 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 23:43:39,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-03-18 23:43:39,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcb94b8c/2fa1e20ffbc04ba99e3f32d616108a56/FLAG82087cb4e [2022-03-18 23:43:39,865 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 23:43:39,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-03-18 23:43:39,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcb94b8c/2fa1e20ffbc04ba99e3f32d616108a56/FLAG82087cb4e [2022-03-18 23:43:39,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcb94b8c/2fa1e20ffbc04ba99e3f32d616108a56 [2022-03-18 23:43:39,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 23:43:39,891 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 23:43:39,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 23:43:39,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 23:43:39,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 23:43:39,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:43:39" (1/1) ... [2022-03-18 23:43:39,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c859d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:39, skipping insertion in model container [2022-03-18 23:43:39,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:43:39" (1/1) ... [2022-03-18 23:43:39,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 23:43:39,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 23:43:40,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-03-18 23:43:40,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:43:40,117 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 23:43:40,127 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-03-18 23:43:40,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:43:40,155 INFO L208 MainTranslator]: Completed translation [2022-03-18 23:43:40,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40 WrapperNode [2022-03-18 23:43:40,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 23:43:40,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 23:43:40,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 23:43:40,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 23:43:40,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 23:43:40,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 23:43:40,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 23:43:40,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 23:43:40,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:43:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:40,243 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) [2022-03-18 23:43:40,259 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 [2022-03-18 23:43:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 23:43:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 23:43:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 23:43:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 23:43:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 23:43:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 23:43:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 23:43:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 23:43:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 23:43:40,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 23:43:40,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 23:43:40,352 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 23:43:40,354 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 23:43:40,521 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 23:43:40,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 23:43:40,525 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 23:43:40,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:43:40 BoogieIcfgContainer [2022-03-18 23:43:40,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 23:43:40,527 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 23:43:40,527 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 23:43:40,528 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 23:43:40,546 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:43:40" (1/1) ... [2022-03-18 23:43:40,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:43:40 BasicIcfg [2022-03-18 23:43:40,562 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 23:43:40,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 23:43:40,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 23:43:40,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 23:43:40,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:43:39" (1/4) ... [2022-03-18 23:43:40,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3d7bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:43:40, skipping insertion in model container [2022-03-18 23:43:40,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:43:40" (2/4) ... [2022-03-18 23:43:40,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3d7bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:43:40, skipping insertion in model container [2022-03-18 23:43:40,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:43:40" (3/4) ... [2022-03-18 23:43:40,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3d7bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:43:40, skipping insertion in model container [2022-03-18 23:43:40,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:43:40" (4/4) ... [2022-03-18 23:43:40,577 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.cqvasr [2022-03-18 23:43:40,580 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 23:43:40,581 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 23:43:40,625 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 23:43:40,632 INFO L340 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 [2022-03-18 23:43:40,633 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 23:43:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 23:43:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 23:43:40,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:40,651 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:40,652 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2022-03-18 23:43:40,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:40,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663926211] [2022-03-18 23:43:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:40,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:40,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890806312] [2022-03-18 23:43:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:40,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:40,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:40,762 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) [2022-03-18 23:43:40,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 23:43:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-18 23:43:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:43:40,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:43:40,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663926211] [2022-03-18 23:43:40,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890806312] [2022-03-18 23:43:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890806312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:43:40,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:43:40,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-18 23:43:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632614315] [2022-03-18 23:43:40,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:40,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-18 23:43:40,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-18 23:43:40,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 23:43:40,967 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:43:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:40,986 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-03-18 23:43:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-18 23:43:40,988 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-03-18 23:43:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:40,993 INFO L225 Difference]: With dead ends: 71 [2022-03-18 23:43:40,993 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 23:43:40,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 23:43:41,004 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:41,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 23:43:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 23:43:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 23:43:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-03-18 23:43:41,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-03-18 23:43:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:41,034 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-03-18 23:43:41,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:43:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-03-18 23:43:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 23:43:41,036 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:41,036 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:41,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:41,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-18 23:43:41,253 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2022-03-18 23:43:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:41,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522186637] [2022-03-18 23:43:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:41,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:41,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640108659] [2022-03-18 23:43:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:41,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:41,276 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) [2022-03-18 23:43:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 23:43:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:41,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 23:43:41,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:43:41,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:43:41,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:41,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522186637] [2022-03-18 23:43:41,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:41,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640108659] [2022-03-18 23:43:41,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640108659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:43:41,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:43:41,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 23:43:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134070572] [2022-03-18 23:43:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:41,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 23:43:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 23:43:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 23:43:41,483 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:43:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:41,499 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-03-18 23:43:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 23:43:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 23:43:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:41,501 INFO L225 Difference]: With dead ends: 44 [2022-03-18 23:43:41,501 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 23:43:41,501 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 23:43:41,502 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:41,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 23:43:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 23:43:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 23:43:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-03-18 23:43:41,533 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-03-18 23:43:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:41,533 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-03-18 23:43:41,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:43:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-03-18 23:43:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 23:43:41,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:41,534 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:41,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:41,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-18 23:43:41,744 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2022-03-18 23:43:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:41,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740718263] [2022-03-18 23:43:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:41,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:41,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305150610] [2022-03-18 23:43:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:41,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:41,761 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) [2022-03-18 23:43:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 23:43:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:43:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:43:41,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:43:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740718263] [2022-03-18 23:43:42,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305150610] [2022-03-18 23:43:42,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305150610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:42,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:42,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 23:43:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321058626] [2022-03-18 23:43:42,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:42,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 23:43:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 23:43:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:43:42,027 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:43:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:42,101 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-03-18 23:43:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:43:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-18 23:43:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:42,102 INFO L225 Difference]: With dead ends: 53 [2022-03-18 23:43:42,103 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 23:43:42,103 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:43:42,104 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:42,104 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 193 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 23:43:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-18 23:43:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 23:43:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 23:43:42,110 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-03-18 23:43:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:42,110 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 23:43:42,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:43:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 23:43:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 23:43:42,111 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:42,111 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:42,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:42,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:42,340 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2022-03-18 23:43:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:42,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334291755] [2022-03-18 23:43:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:42,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:42,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:42,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972456413] [2022-03-18 23:43:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:42,368 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) [2022-03-18 23:43:42,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 23:43:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 23:43:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:43:42,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:43:42,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334291755] [2022-03-18 23:43:42,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972456413] [2022-03-18 23:43:42,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972456413] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:43:42,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:43:42,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 23:43:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116970755] [2022-03-18 23:43:42,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:42,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:43:42,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:42,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:43:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:43:42,615 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:43:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:42,645 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-18 23:43:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:43:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-03-18 23:43:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:42,646 INFO L225 Difference]: With dead ends: 43 [2022-03-18 23:43:42,646 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 23:43:42,647 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:43:42,647 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:42,648 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 23:43:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 23:43:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 23:43:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-18 23:43:42,653 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-03-18 23:43:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:42,653 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-18 23:43:42,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:43:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-18 23:43:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 23:43:42,654 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:42,654 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:42,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:42,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:42,871 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2022-03-18 23:43:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:42,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963644144] [2022-03-18 23:43:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:42,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:42,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:42,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281526174] [2022-03-18 23:43:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:42,882 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) [2022-03-18 23:43:42,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 23:43:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:43:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:43:42,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:43:42,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963644144] [2022-03-18 23:43:42,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281526174] [2022-03-18 23:43:42,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281526174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:43:42,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:43:42,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:43:42,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795947039] [2022-03-18 23:43:42,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:42,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:43:42,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:43:42,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:43:42,992 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:43:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:43,015 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-18 23:43:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:43:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-18 23:43:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:43,016 INFO L225 Difference]: With dead ends: 66 [2022-03-18 23:43:43,016 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 23:43:43,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:43:43,017 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:43,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 23:43:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 23:43:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 23:43:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-03-18 23:43:43,024 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-03-18 23:43:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:43,024 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-03-18 23:43:43,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:43:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-03-18 23:43:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 23:43:43,025 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:43,026 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:43,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:43,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:43,246 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2022-03-18 23:43:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719339048] [2022-03-18 23:43:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:43,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:43,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:43,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081968991] [2022-03-18 23:43:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:43,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:43,257 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) [2022-03-18 23:43:43,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 23:43:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:43,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 23:43:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:43:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:43:43,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719339048] [2022-03-18 23:43:43,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081968991] [2022-03-18 23:43:43,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081968991] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:43:43,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:43:43,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 23:43:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613750327] [2022-03-18 23:43:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:43,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:43:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:43:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:43:43,513 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 23:43:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:43,539 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-18 23:43:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:43:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-18 23:43:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:43,540 INFO L225 Difference]: With dead ends: 57 [2022-03-18 23:43:43,540 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 23:43:43,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:43:43,541 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:43,541 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 23:43:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-18 23:43:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 23:43:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-18 23:43:43,547 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-03-18 23:43:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:43,548 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-18 23:43:43,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 23:43:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-18 23:43:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 23:43:43,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:43,549 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:43,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:43,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:43,764 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2022-03-18 23:43:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:43,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051833590] [2022-03-18 23:43:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:43,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:43,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:43,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388360690] [2022-03-18 23:43:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:43,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:43,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:43,784 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) [2022-03-18 23:43:43,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 23:43:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 23:43:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 23:43:43,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 23:43:44,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:44,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051833590] [2022-03-18 23:43:44,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:44,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388360690] [2022-03-18 23:43:44,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388360690] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:43:44,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:43:44,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 23:43:44,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376897998] [2022-03-18 23:43:44,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:44,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:43:44,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:43:44,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:43:44,108 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:43:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:44,155 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-03-18 23:43:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:43:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-03-18 23:43:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:44,158 INFO L225 Difference]: With dead ends: 61 [2022-03-18 23:43:44,158 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 23:43:44,158 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:43:44,158 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:44,159 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 23:43:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-18 23:43:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 23:43:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-03-18 23:43:44,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-03-18 23:43:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:44,165 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-03-18 23:43:44,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:43:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-03-18 23:43:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 23:43:44,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:44,166 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:44,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:44,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:44,383 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2022-03-18 23:43:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:44,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224622468] [2022-03-18 23:43:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:44,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:44,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659340840] [2022-03-18 23:43:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:44,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:44,398 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) [2022-03-18 23:43:44,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 23:43:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 23:43:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 23:43:44,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:44,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224622468] [2022-03-18 23:43:44,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659340840] [2022-03-18 23:43:44,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659340840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:43:44,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:43:44,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 23:43:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732933246] [2022-03-18 23:43:44,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:44,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:43:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:43:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-18 23:43:44,776 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 23:43:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:44,904 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-18 23:43:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 23:43:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-18 23:43:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:44,906 INFO L225 Difference]: With dead ends: 65 [2022-03-18 23:43:44,906 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 23:43:44,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-18 23:43:44,907 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:44,908 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:43:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 23:43:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 23:43:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 23:43:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-03-18 23:43:44,921 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-03-18 23:43:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:44,921 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-03-18 23:43:44,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 23:43:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-03-18 23:43:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 23:43:44,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:44,926 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:44,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:45,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-18 23:43:45,143 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2022-03-18 23:43:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66258200] [2022-03-18 23:43:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:45,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:45,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964475700] [2022-03-18 23:43:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:45,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:45,166 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:45,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 23:43:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:43:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 23:43:45,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 23:43:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66258200] [2022-03-18 23:43:45,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964475700] [2022-03-18 23:43:45,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964475700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:45,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:45,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 23:43:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848503653] [2022-03-18 23:43:45,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:45,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:43:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:43:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:43:45,425 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:43:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:45,577 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2022-03-18 23:43:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:43:45,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 60 [2022-03-18 23:43:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:45,579 INFO L225 Difference]: With dead ends: 215 [2022-03-18 23:43:45,579 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 23:43:45,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:43:45,580 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 139 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:45,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 201 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:43:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 23:43:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-03-18 23:43:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 130 states have internal predecessors, (150), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 23:43:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2022-03-18 23:43:45,596 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 60 [2022-03-18 23:43:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:45,596 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2022-03-18 23:43:45,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:43:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2022-03-18 23:43:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 23:43:45,597 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:45,597 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:45,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:45,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:45,811 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:45,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2022-03-18 23:43:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:45,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721663666] [2022-03-18 23:43:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:45,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:45,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025744077] [2022-03-18 23:43:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:45,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:45,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:45,849 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:45,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 23:43:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:45,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:43:45,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 23:43:46,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 23:43:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721663666] [2022-03-18 23:43:46,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025744077] [2022-03-18 23:43:46,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025744077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:46,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:46,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 23:43:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394925706] [2022-03-18 23:43:46,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:46,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 23:43:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 23:43:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:43:46,125 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 23:43:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:46,256 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2022-03-18 23:43:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 23:43:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-18 23:43:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:46,258 INFO L225 Difference]: With dead ends: 283 [2022-03-18 23:43:46,258 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 23:43:46,258 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 23:43:46,259 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 64 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:46,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 323 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:43:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 23:43:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2022-03-18 23:43:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 156 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-18 23:43:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2022-03-18 23:43:46,276 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 61 [2022-03-18 23:43:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:46,276 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2022-03-18 23:43:46,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 23:43:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2022-03-18 23:43:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 23:43:46,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:46,277 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:46,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:46,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 23:43:46,488 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 317217743, now seen corresponding path program 1 times [2022-03-18 23:43:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:46,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572796341] [2022-03-18 23:43:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:46,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435991390] [2022-03-18 23:43:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:46,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:46,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:46,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 23:43:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:43:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 23:43:46,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 23:43:46,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:46,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572796341] [2022-03-18 23:43:46,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:46,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435991390] [2022-03-18 23:43:46,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435991390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:46,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:46,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 23:43:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709931268] [2022-03-18 23:43:46,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:46,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:43:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:43:46,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:43:46,795 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:43:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:46,999 INFO L93 Difference]: Finished difference Result 348 states and 452 transitions. [2022-03-18 23:43:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:43:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 63 [2022-03-18 23:43:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:47,002 INFO L225 Difference]: With dead ends: 348 [2022-03-18 23:43:47,002 INFO L226 Difference]: Without dead ends: 252 [2022-03-18 23:43:47,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:43:47,006 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 103 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:47,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 193 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:43:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-18 23:43:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-03-18 23:43:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-18 23:43:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 306 transitions. [2022-03-18 23:43:47,031 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 306 transitions. Word has length 63 [2022-03-18 23:43:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:47,031 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 306 transitions. [2022-03-18 23:43:47,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:43:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 306 transitions. [2022-03-18 23:43:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 23:43:47,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:47,032 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:47,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 23:43:47,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 23:43:47,248 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2022-03-18 23:43:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364574431] [2022-03-18 23:43:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:47,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:47,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281849997] [2022-03-18 23:43:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:47,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:47,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:47,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 23:43:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:47,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 23:43:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 23:43:47,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 23:43:47,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364574431] [2022-03-18 23:43:47,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281849997] [2022-03-18 23:43:47,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281849997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:47,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:47,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 23:43:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850583303] [2022-03-18 23:43:47,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:47,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 23:43:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 23:43:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-18 23:43:47,741 INFO L87 Difference]: Start difference. First operand 248 states and 306 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 23:43:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:48,159 INFO L93 Difference]: Finished difference Result 334 states and 433 transitions. [2022-03-18 23:43:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 23:43:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 68 [2022-03-18 23:43:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:48,162 INFO L225 Difference]: With dead ends: 334 [2022-03-18 23:43:48,163 INFO L226 Difference]: Without dead ends: 328 [2022-03-18 23:43:48,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-18 23:43:48,163 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 47 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:48,164 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 351 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 23:43:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-18 23:43:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-03-18 23:43:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 204 states have internal predecessors, (233), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-18 23:43:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2022-03-18 23:43:48,184 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 68 [2022-03-18 23:43:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:48,184 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2022-03-18 23:43:48,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 23:43:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2022-03-18 23:43:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 23:43:48,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:48,185 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:48,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:48,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 23:43:48,404 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2022-03-18 23:43:48,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:48,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067045154] [2022-03-18 23:43:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:48,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:48,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008536315] [2022-03-18 23:43:48,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:43:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:48,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:48,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 23:43:48,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:43:48,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:43:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 23:43:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 23:43:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 23:43:49,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:49,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067045154] [2022-03-18 23:43:49,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:49,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008536315] [2022-03-18 23:43:49,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008536315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:49,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:49,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-18 23:43:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99082334] [2022-03-18 23:43:49,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:49,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 23:43:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 23:43:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-18 23:43:49,072 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 23:43:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:50,345 INFO L93 Difference]: Finished difference Result 319 states and 399 transitions. [2022-03-18 23:43:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:43:50,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-03-18 23:43:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:50,347 INFO L225 Difference]: With dead ends: 319 [2022-03-18 23:43:50,347 INFO L226 Difference]: Without dead ends: 316 [2022-03-18 23:43:50,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-18 23:43:50,348 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:50,348 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 259 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 23:43:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-18 23:43:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2022-03-18 23:43:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 212 states have internal predecessors, (242), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-18 23:43:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 376 transitions. [2022-03-18 23:43:50,371 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 376 transitions. Word has length 73 [2022-03-18 23:43:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:50,371 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 376 transitions. [2022-03-18 23:43:50,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 23:43:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 376 transitions. [2022-03-18 23:43:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 23:43:50,372 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:50,372 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:50,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:50,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 23:43:50,590 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2022-03-18 23:43:50,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:50,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910486760] [2022-03-18 23:43:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:50,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:50,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:50,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773287285] [2022-03-18 23:43:50,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:43:50,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:50,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:50,601 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:50,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 23:43:50,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 23:43:50,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:43:50,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 23:43:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 23:43:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910486760] [2022-03-18 23:43:51,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773287285] [2022-03-18 23:43:51,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773287285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:43:51,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:43:51,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 23:43:51,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92180332] [2022-03-18 23:43:51,209 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:51,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 23:43:51,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:51,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 23:43:51,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:43:51,210 INFO L87 Difference]: Start difference. First operand 305 states and 376 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 23:43:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:51,374 INFO L93 Difference]: Finished difference Result 337 states and 411 transitions. [2022-03-18 23:43:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 23:43:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-03-18 23:43:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:51,376 INFO L225 Difference]: With dead ends: 337 [2022-03-18 23:43:51,376 INFO L226 Difference]: Without dead ends: 333 [2022-03-18 23:43:51,376 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:43:51,377 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:51,377 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 249 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:43:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-18 23:43:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2022-03-18 23:43:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 228 states have internal predecessors, (260), 73 states have call successors, (73), 37 states have call predecessors, (73), 35 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-18 23:43:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 402 transitions. [2022-03-18 23:43:51,399 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 402 transitions. Word has length 78 [2022-03-18 23:43:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:51,399 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 402 transitions. [2022-03-18 23:43:51,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 23:43:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 402 transitions. [2022-03-18 23:43:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 23:43:51,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:51,400 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:51,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:51,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:51,618 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2022-03-18 23:43:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792797886] [2022-03-18 23:43:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:51,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:51,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947146471] [2022-03-18 23:43:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:51,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:51,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:51,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:51,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 23:43:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 23:43:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-18 23:43:52,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-18 23:43:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:52,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792797886] [2022-03-18 23:43:52,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:52,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947146471] [2022-03-18 23:43:52,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947146471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:52,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:52,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-18 23:43:52,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535334633] [2022-03-18 23:43:52,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:52,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 23:43:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 23:43:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-18 23:43:52,602 INFO L87 Difference]: Start difference. First operand 330 states and 402 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 23:43:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:54,671 INFO L93 Difference]: Finished difference Result 392 states and 488 transitions. [2022-03-18 23:43:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 23:43:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 84 [2022-03-18 23:43:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:54,673 INFO L225 Difference]: With dead ends: 392 [2022-03-18 23:43:54,673 INFO L226 Difference]: Without dead ends: 377 [2022-03-18 23:43:54,674 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 23:43:54,674 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:54,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 510 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 23:43:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-18 23:43:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 368. [2022-03-18 23:43:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 252 states have internal predecessors, (294), 84 states have call successors, (84), 37 states have call predecessors, (84), 36 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 23:43:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 460 transitions. [2022-03-18 23:43:54,706 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 460 transitions. Word has length 84 [2022-03-18 23:43:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:54,706 INFO L478 AbstractCegarLoop]: Abstraction has 368 states and 460 transitions. [2022-03-18 23:43:54,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 23:43:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 460 transitions. [2022-03-18 23:43:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 23:43:54,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:54,707 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:54,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:54,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 23:43:54,937 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2022-03-18 23:43:54,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:54,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309860837] [2022-03-18 23:43:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:54,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:54,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249263880] [2022-03-18 23:43:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:54,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:54,961 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:54,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 23:43:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:55,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 23:43:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-18 23:43:55,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:56,119 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:43:56,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309860837] [2022-03-18 23:43:56,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249263880] [2022-03-18 23:43:56,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249263880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:43:56,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:43:56,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 23:43:56,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767662926] [2022-03-18 23:43:56,736 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:56,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 23:43:56,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 23:43:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-18 23:43:56,736 INFO L87 Difference]: Start difference. First operand 368 states and 460 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 23:43:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:57,540 INFO L93 Difference]: Finished difference Result 377 states and 468 transitions. [2022-03-18 23:43:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 23:43:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-03-18 23:43:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:57,544 INFO L225 Difference]: With dead ends: 377 [2022-03-18 23:43:57,544 INFO L226 Difference]: Without dead ends: 375 [2022-03-18 23:43:57,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-18 23:43:57,545 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:57,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 402 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 23:43:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-18 23:43:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-03-18 23:43:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 250 states have (on average 1.184) internal successors, (296), 255 states have internal predecessors, (296), 84 states have call successors, (84), 38 states have call predecessors, (84), 37 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 23:43:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 462 transitions. [2022-03-18 23:43:57,609 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 462 transitions. Word has length 101 [2022-03-18 23:43:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:57,610 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 462 transitions. [2022-03-18 23:43:57,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 23:43:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 462 transitions. [2022-03-18 23:43:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 23:43:57,611 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:57,611 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:57,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:57,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 23:43:57,828 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash 487608439, now seen corresponding path program 4 times [2022-03-18 23:43:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:57,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47994534] [2022-03-18 23:43:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:57,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:57,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501943422] [2022-03-18 23:43:57,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 23:43:57,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:57,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:57,841 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:57,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 23:43:57,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 23:43:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:43:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 23:43:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-18 23:43:58,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:43:58,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47994534] [2022-03-18 23:43:58,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501943422] [2022-03-18 23:43:58,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501943422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:43:58,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:43:58,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:43:58,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564343562] [2022-03-18 23:43:58,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:43:58,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:43:58,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:43:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:43:58,043 INFO L87 Difference]: Start difference. First operand 372 states and 462 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-18 23:43:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:58,123 INFO L93 Difference]: Finished difference Result 535 states and 713 transitions. [2022-03-18 23:43:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:43:58,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 105 [2022-03-18 23:43:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:58,125 INFO L225 Difference]: With dead ends: 535 [2022-03-18 23:43:58,126 INFO L226 Difference]: Without dead ends: 417 [2022-03-18 23:43:58,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:43:58,127 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:58,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:43:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-18 23:43:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-03-18 23:43:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 259 states have (on average 1.193050193050193) internal successors, (309), 263 states have internal predecessors, (309), 90 states have call successors, (90), 38 states have call predecessors, (90), 37 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-18 23:43:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 487 transitions. [2022-03-18 23:43:58,163 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 487 transitions. Word has length 105 [2022-03-18 23:43:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:58,164 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 487 transitions. [2022-03-18 23:43:58,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-18 23:43:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 487 transitions. [2022-03-18 23:43:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 23:43:58,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:58,165 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-03-18 23:43:58,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:58,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 23:43:58,387 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 1 times [2022-03-18 23:43:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028697418] [2022-03-18 23:43:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:58,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:58,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437524526] [2022-03-18 23:43:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:58,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:58,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:58,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:58,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 23:43:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:43:58,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 23:43:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:43:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-18 23:43:58,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:43:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-18 23:43:58,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:43:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028697418] [2022-03-18 23:43:58,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:43:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437524526] [2022-03-18 23:43:58,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437524526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:43:58,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:43:58,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 23:43:58,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838344650] [2022-03-18 23:43:58,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:43:58,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 23:43:58,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:43:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 23:43:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 23:43:58,969 INFO L87 Difference]: Start difference. First operand 387 states and 487 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-18 23:43:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:43:59,469 INFO L93 Difference]: Finished difference Result 1393 states and 1817 transitions. [2022-03-18 23:43:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 23:43:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 116 [2022-03-18 23:43:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:43:59,474 INFO L225 Difference]: With dead ends: 1393 [2022-03-18 23:43:59,474 INFO L226 Difference]: Without dead ends: 1260 [2022-03-18 23:43:59,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-03-18 23:43:59,475 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 313 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:43:59,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 386 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 23:43:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-18 23:43:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1202. [2022-03-18 23:43:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 771 states have (on average 1.1595330739299612) internal successors, (894), 782 states have internal predecessors, (894), 305 states have call successors, (305), 126 states have call predecessors, (305), 125 states have return successors, (296), 293 states have call predecessors, (296), 296 states have call successors, (296) [2022-03-18 23:43:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1495 transitions. [2022-03-18 23:43:59,630 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1495 transitions. Word has length 116 [2022-03-18 23:43:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:43:59,632 INFO L478 AbstractCegarLoop]: Abstraction has 1202 states and 1495 transitions. [2022-03-18 23:43:59,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-18 23:43:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1495 transitions. [2022-03-18 23:43:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 23:43:59,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:43:59,633 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:43:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 23:43:59,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 23:43:59,846 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:43:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:43:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 2 times [2022-03-18 23:43:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:43:59,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116720694] [2022-03-18 23:43:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:43:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:43:59,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:43:59,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739630986] [2022-03-18 23:43:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:43:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:43:59,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:43:59,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:43:59,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 23:43:59,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:43:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:43:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 23:43:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:44:03,424 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:44:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 139 proven. 92 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-18 23:44:05,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:44:09,560 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:44:18,613 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:44:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-18 23:44:29,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:44:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116720694] [2022-03-18 23:44:29,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:44:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739630986] [2022-03-18 23:44:29,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739630986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:44:29,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:44:29,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-18 23:44:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570255042] [2022-03-18 23:44:29,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:44:29,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 23:44:29,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:44:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 23:44:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=638, Unknown=4, NotChecked=0, Total=812 [2022-03-18 23:44:29,375 INFO L87 Difference]: Start difference. First operand 1202 states and 1495 transitions. Second operand has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-18 23:44:32,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:44:34,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:44:49,691 WARN L232 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 146 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:44:57,244 WARN L232 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:44:58,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:45:01,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:45:03,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:45:05,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:45:08,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:45:10,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:45:19,895 WARN L232 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:46:14,655 WARN L232 SmtUtils]: Spent 54.23s on a formula simplification. DAG size of input: 109 DAG size of output: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:46:16,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:19,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:30,374 WARN L232 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 129 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:46:32,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:34,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:36,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:40,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:42,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:44,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:46:54,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:02,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:11,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:13,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:15,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:32,686 WARN L232 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 147 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:47:36,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:38,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:41,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:47:52,170 WARN L232 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 147 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:49:01,953 WARN L232 SmtUtils]: Spent 58.65s on a formula simplification. DAG size of input: 110 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:49:03,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:49:05,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:49:07,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:11,024 WARN L232 SmtUtils]: Spent 56.58s on a formula simplification. DAG size of input: 146 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:50:17,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:19,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:22,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:24,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:26,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:36,342 WARN L232 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:50:38,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:40,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:42,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:44,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:46,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:48,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:50:55,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:51:05,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:51:07,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:51:17,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:51:19,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:16,525 WARN L232 SmtUtils]: Spent 53.65s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:52:19,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:22,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:24,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:26,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:29,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:56,058 WARN L232 SmtUtils]: Spent 25.04s on a formula simplification. DAG size of input: 126 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:52:58,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:00,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:02,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:12,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:53:12,283 INFO L93 Difference]: Finished difference Result 1710 states and 2249 transitions. [2022-03-18 23:53:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 23:53:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) Word has length 124 [2022-03-18 23:53:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:53:12,289 INFO L225 Difference]: With dead ends: 1710 [2022-03-18 23:53:12,289 INFO L226 Difference]: Without dead ends: 1708 [2022-03-18 23:53:12,290 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 409.1s TimeCoverageRelationStatistics Valid=918, Invalid=3355, Unknown=17, NotChecked=0, Total=4290 [2022-03-18 23:53:12,291 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 204 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 297 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:53:12,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 898 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1490 Invalid, 49 Unknown, 0 Unchecked, 134.2s Time] [2022-03-18 23:53:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-03-18 23:53:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1555. [2022-03-18 23:53:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 978 states have (on average 1.179959100204499) internal successors, (1154), 995 states have internal predecessors, (1154), 434 states have call successors, (434), 143 states have call predecessors, (434), 142 states have return successors, (425), 416 states have call predecessors, (425), 425 states have call successors, (425) [2022-03-18 23:53:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2013 transitions. [2022-03-18 23:53:12,602 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2013 transitions. Word has length 124 [2022-03-18 23:53:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:53:12,603 INFO L478 AbstractCegarLoop]: Abstraction has 1555 states and 2013 transitions. [2022-03-18 23:53:12,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-18 23:53:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2013 transitions. [2022-03-18 23:53:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 23:53:12,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:53:12,604 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:53:12,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-18 23:53:12,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:53:12,816 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:53:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:53:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 3 times [2022-03-18 23:53:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:53:12,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985304776] [2022-03-18 23:53:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:53:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:53:12,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:53:12,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150948947] [2022-03-18 23:53:12,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:53:12,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:53:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:53:12,834 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:53:12,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 23:53:12,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 23:53:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:53:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 23:53:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:53:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-18 23:53:13,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:53:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-18 23:53:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:53:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985304776] [2022-03-18 23:53:45,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:53:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150948947] [2022-03-18 23:53:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150948947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:53:45,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:53:45,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 23:53:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875445864] [2022-03-18 23:53:45,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:53:45,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 23:53:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:53:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 23:53:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=354, Unknown=3, NotChecked=0, Total=462 [2022-03-18 23:53:45,693 INFO L87 Difference]: Start difference. First operand 1555 states and 2013 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-03-18 23:54:06,040 WARN L232 SmtUtils]: Spent 14.37s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:54:14,382 WARN L232 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:54:16,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:18,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:22,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:24,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:33,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 8.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:35,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:37,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:38,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:41,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:43,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:45,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:49,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:51,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:55,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:57,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:00,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:02,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:04,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:05,126 INFO L93 Difference]: Finished difference Result 1911 states and 2520 transitions. [2022-03-18 23:55:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 23:55:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) Word has length 128 [2022-03-18 23:55:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:05,148 INFO L225 Difference]: With dead ends: 1911 [2022-03-18 23:55:05,148 INFO L226 Difference]: Without dead ends: 1895 [2022-03-18 23:55:05,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=327, Invalid=928, Unknown=5, NotChecked=0, Total=1260 [2022-03-18 23:55:05,164 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 162 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 219 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:05,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 630 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 668 Invalid, 16 Unknown, 0 Unchecked, 50.3s Time] [2022-03-18 23:55:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-03-18 23:55:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1805. [2022-03-18 23:55:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1146 states have (on average 1.198952879581152) internal successors, (1374), 1160 states have internal predecessors, (1374), 502 states have call successors, (502), 158 states have call predecessors, (502), 156 states have return successors, (499), 486 states have call predecessors, (499), 499 states have call successors, (499) [2022-03-18 23:55:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2375 transitions. [2022-03-18 23:55:05,651 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2375 transitions. Word has length 128 [2022-03-18 23:55:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:05,651 INFO L478 AbstractCegarLoop]: Abstraction has 1805 states and 2375 transitions. [2022-03-18 23:55:05,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-03-18 23:55:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2375 transitions. [2022-03-18 23:55:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 23:55:05,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:05,653 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:05,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 23:55:05,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:05,868 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 1 times [2022-03-18 23:55:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:05,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257106904] [2022-03-18 23:55:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:05,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:05,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650898029] [2022-03-18 23:55:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:05,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:05,882 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:55:05,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 23:55:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:55:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 23:55:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-18 23:55:06,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-18 23:55:06,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257106904] [2022-03-18 23:55:06,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650898029] [2022-03-18 23:55:06,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650898029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:06,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:06,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 23:55:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404817683] [2022-03-18 23:55:06,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:06,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 23:55:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 23:55:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 23:55:06,419 INFO L87 Difference]: Start difference. First operand 1805 states and 2375 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-18 23:55:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:07,210 INFO L93 Difference]: Finished difference Result 1868 states and 2437 transitions. [2022-03-18 23:55:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 23:55:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) Word has length 133 [2022-03-18 23:55:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:07,216 INFO L225 Difference]: With dead ends: 1868 [2022-03-18 23:55:07,216 INFO L226 Difference]: Without dead ends: 1858 [2022-03-18 23:55:07,216 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-18 23:55:07,217 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 297 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:07,217 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 346 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 23:55:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-18 23:55:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1826. [2022-03-18 23:55:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1167 states have (on average 1.168808911739503) internal successors, (1364), 1181 states have internal predecessors, (1364), 502 states have call successors, (502), 158 states have call predecessors, (502), 156 states have return successors, (499), 486 states have call predecessors, (499), 499 states have call successors, (499) [2022-03-18 23:55:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2365 transitions. [2022-03-18 23:55:07,668 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2365 transitions. Word has length 133 [2022-03-18 23:55:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:07,668 INFO L478 AbstractCegarLoop]: Abstraction has 1826 states and 2365 transitions. [2022-03-18 23:55:07,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-18 23:55:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2365 transitions. [2022-03-18 23:55:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-18 23:55:07,670 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:07,670 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:07,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 23:55:07,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:07,887 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 2 times [2022-03-18 23:55:07,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:07,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906319551] [2022-03-18 23:55:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:07,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:07,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:07,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321296179] [2022-03-18 23:55:07,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:55:07,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:07,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:07,896 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:55:07,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 23:55:07,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:55:07,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:55:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-18 23:55:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 123 proven. 126 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-18 23:55:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 23:55:11,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:11,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906319551] [2022-03-18 23:55:11,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:11,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321296179] [2022-03-18 23:55:11,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321296179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:11,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:11,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-18 23:55:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599077281] [2022-03-18 23:55:11,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:11,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 23:55:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:11,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 23:55:11,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-18 23:55:11,129 INFO L87 Difference]: Start difference. First operand 1826 states and 2365 transitions. Second operand has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-18 23:55:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:16,748 INFO L93 Difference]: Finished difference Result 1948 states and 2503 transitions. [2022-03-18 23:55:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 23:55:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 134 [2022-03-18 23:55:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:16,754 INFO L225 Difference]: With dead ends: 1948 [2022-03-18 23:55:16,754 INFO L226 Difference]: Without dead ends: 1937 [2022-03-18 23:55:16,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 23:55:16,755 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 128 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:16,755 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 731 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 23:55:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-03-18 23:55:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1778. [2022-03-18 23:55:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1126 states have (on average 1.1465364120781527) internal successors, (1291), 1143 states have internal predecessors, (1291), 481 states have call successors, (481), 171 states have call predecessors, (481), 170 states have return successors, (479), 463 states have call predecessors, (479), 479 states have call successors, (479) [2022-03-18 23:55:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2251 transitions. [2022-03-18 23:55:17,231 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2251 transitions. Word has length 134 [2022-03-18 23:55:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:17,231 INFO L478 AbstractCegarLoop]: Abstraction has 1778 states and 2251 transitions. [2022-03-18 23:55:17,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-18 23:55:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2251 transitions. [2022-03-18 23:55:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-18 23:55:17,237 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:17,237 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:17,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 23:55:17,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:17,451 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash -42185316, now seen corresponding path program 2 times [2022-03-18 23:55:17,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:17,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249550359] [2022-03-18 23:55:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:17,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:17,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284968034] [2022-03-18 23:55:17,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:55:17,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:17,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:17,461 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:55:17,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 23:55:17,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:55:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:55:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 23:55:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 2606 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-18 23:55:18,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 302 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-18 23:55:18,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249550359] [2022-03-18 23:55:18,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284968034] [2022-03-18 23:55:18,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284968034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:18,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:18,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 23:55:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245014148] [2022-03-18 23:55:18,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:18,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 23:55:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 23:55:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 23:55:18,663 INFO L87 Difference]: Start difference. First operand 1778 states and 2251 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-18 23:55:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:21,848 INFO L93 Difference]: Finished difference Result 7569 states and 10806 transitions. [2022-03-18 23:55:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 23:55:21,849 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 260 [2022-03-18 23:55:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:21,870 INFO L225 Difference]: With dead ends: 7569 [2022-03-18 23:55:21,870 INFO L226 Difference]: Without dead ends: 7560 [2022-03-18 23:55:21,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1384, Invalid=2398, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 23:55:21,873 INFO L912 BasicCegarLoop]: 152 mSDtfsCounter, 865 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:21,873 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 634 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 23:55:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7560 states. [2022-03-18 23:55:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7560 to 7418. [2022-03-18 23:55:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7418 states, 4752 states have (on average 1.2346380471380471) internal successors, (5867), 4917 states have internal predecessors, (5867), 2218 states have call successors, (2218), 449 states have call predecessors, (2218), 447 states have return successors, (2202), 2051 states have call predecessors, (2202), 2202 states have call successors, (2202) [2022-03-18 23:55:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7418 states to 7418 states and 10287 transitions. [2022-03-18 23:55:24,216 INFO L78 Accepts]: Start accepts. Automaton has 7418 states and 10287 transitions. Word has length 260 [2022-03-18 23:55:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:24,216 INFO L478 AbstractCegarLoop]: Abstraction has 7418 states and 10287 transitions. [2022-03-18 23:55:24,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-18 23:55:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7418 states and 10287 transitions. [2022-03-18 23:55:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-18 23:55:24,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:24,221 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:24,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 23:55:24,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:24,435 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2118395671, now seen corresponding path program 1 times [2022-03-18 23:55:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344065933] [2022-03-18 23:55:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:24,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:24,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797863849] [2022-03-18 23:55:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:24,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:24,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:24,464 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:55:24,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 23:55:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:55:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 23:55:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 2610 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-18 23:55:25,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 306 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-18 23:55:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344065933] [2022-03-18 23:55:25,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797863849] [2022-03-18 23:55:25,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797863849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:25,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:25,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 23:55:25,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560701362] [2022-03-18 23:55:25,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:25,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 23:55:25,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 23:55:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 23:55:25,518 INFO L87 Difference]: Start difference. First operand 7418 states and 10287 transitions. Second operand has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-18 23:55:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:27,637 INFO L93 Difference]: Finished difference Result 8508 states and 11818 transitions. [2022-03-18 23:55:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 23:55:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 263 [2022-03-18 23:55:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:27,651 INFO L225 Difference]: With dead ends: 8508 [2022-03-18 23:55:27,652 INFO L226 Difference]: Without dead ends: 4610 [2022-03-18 23:55:27,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1383, Invalid=2399, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 23:55:27,661 INFO L912 BasicCegarLoop]: 152 mSDtfsCounter, 597 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:27,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 615 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 23:55:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-03-18 23:55:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4322. [2022-03-18 23:55:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 2646 states have (on average 1.116780045351474) internal successors, (2955), 2679 states have internal predecessors, (2955), 1249 states have call successors, (1249), 427 states have call predecessors, (1249), 426 states have return successors, (1247), 1215 states have call predecessors, (1247), 1247 states have call successors, (1247) [2022-03-18 23:55:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5451 transitions. [2022-03-18 23:55:28,979 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5451 transitions. Word has length 263 [2022-03-18 23:55:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:28,979 INFO L478 AbstractCegarLoop]: Abstraction has 4322 states and 5451 transitions. [2022-03-18 23:55:28,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-18 23:55:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5451 transitions. [2022-03-18 23:55:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-03-18 23:55:29,010 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:29,010 INFO L500 BasicCegarLoop]: trace histogram [77, 76, 76, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 11, 11, 10, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:29,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 23:55:29,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:29,211 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 678663881, now seen corresponding path program 2 times [2022-03-18 23:55:29,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:29,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689715165] [2022-03-18 23:55:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:29,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:29,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:29,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663732572] [2022-03-18 23:55:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:55:29,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:29,224 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:55:29,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 23:55:29,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:55:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:55:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 23:55:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 12389 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 23:55:30,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 1445 refuted. 0 times theorem prover too weak. 11424 trivial. 0 not checked. [2022-03-18 23:55:32,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689715165] [2022-03-18 23:55:32,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663732572] [2022-03-18 23:55:32,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663732572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:32,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:32,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-18 23:55:32,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653396873] [2022-03-18 23:55:32,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:32,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 23:55:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 23:55:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 23:55:32,075 INFO L87 Difference]: Start difference. First operand 4322 states and 5451 transitions. Second operand has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) [2022-03-18 23:55:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:37,626 INFO L93 Difference]: Finished difference Result 10509 states and 13765 transitions. [2022-03-18 23:55:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-18 23:55:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) Word has length 516 [2022-03-18 23:55:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:37,662 INFO L225 Difference]: With dead ends: 10509 [2022-03-18 23:55:37,662 INFO L226 Difference]: Without dead ends: 10135 [2022-03-18 23:55:37,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5831, Invalid=9919, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 23:55:37,668 INFO L912 BasicCegarLoop]: 280 mSDtfsCounter, 2105 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 1792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1792 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:37,668 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2105 Valid, 1250 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1792 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 23:55:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2022-03-18 23:55:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 9395. [2022-03-18 23:55:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 5670 states have (on average 1.1216931216931216) internal successors, (6360), 5735 states have internal predecessors, (6360), 2786 states have call successors, (2786), 940 states have call predecessors, (2786), 938 states have return successors, (2783), 2719 states have call predecessors, (2783), 2783 states have call successors, (2783) [2022-03-18 23:55:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 11929 transitions. [2022-03-18 23:55:40,223 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 11929 transitions. Word has length 516 [2022-03-18 23:55:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:40,224 INFO L478 AbstractCegarLoop]: Abstraction has 9395 states and 11929 transitions. [2022-03-18 23:55:40,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) [2022-03-18 23:55:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 11929 transitions. [2022-03-18 23:55:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-03-18 23:55:40,234 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:40,234 INFO L500 BasicCegarLoop]: trace histogram [81, 80, 80, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 11, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:40,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 23:55:40,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 23:55:40,434 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:40,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2865793, now seen corresponding path program 3 times [2022-03-18 23:55:40,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:40,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130018372] [2022-03-18 23:55:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:40,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:40,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:40,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372217132] [2022-03-18 23:55:40,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:55:40,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:40,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:40,464 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:55:40,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process