/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/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:33:50,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:33:50,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:33:50,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:33:50,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:33:50,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:33:50,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:33:50,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:33:50,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:33:50,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:33:50,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:33:50,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:33:50,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:33:50,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:33:50,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:33:50,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:33:50,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:33:50,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:33:50,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:33:50,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:33:50,329 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:33:50,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:33:50,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:33:50,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:33:50,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:33:50,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 10:33:50,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 10:33:50,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 10:33:50,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 10:33:50,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 10:33:50,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 10:33:50,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 10:33:50,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 10:33:50,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 10:33:50,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 10:33:50,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 10:33:50,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 10:33:50,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 10:33:50,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 10:33:50,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:33:50,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:33:50,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:33:50,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:33:50,369 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:33:50,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:33:50,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:33:50,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:33:50,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:33:50,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:33:50,371 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:33:50,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:33:50,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:33:50,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:33:50,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:33:50,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:33:50,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:33:50,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:33:50,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:33:50,375 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:33:50,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:33:50,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:33:50,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:33:50,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:33:50,588 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:33:50,589 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:33:50,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-03-20 10:33:50,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83fc4b1ea/98e5a1fea573477ea5aba98c94ff0456/FLAGc3221682e [2022-03-20 10:33:50,998 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:33:50,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-03-20 10:33:51,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83fc4b1ea/98e5a1fea573477ea5aba98c94ff0456/FLAGc3221682e [2022-03-20 10:33:51,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83fc4b1ea/98e5a1fea573477ea5aba98c94ff0456 [2022-03-20 10:33:51,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:33:51,022 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:33:51,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:33:51,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:33:51,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:33:51,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d614277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51, skipping insertion in model container [2022-03-20 10:33:51,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:33:51,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:33:51,208 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/hard-ll_valuebound100.c[538,551] [2022-03-20 10:33:51,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:33:51,236 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:33:51,245 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/hard-ll_valuebound100.c[538,551] [2022-03-20 10:33:51,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:33:51,270 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:33:51,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51 WrapperNode [2022-03-20 10:33:51,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:33:51,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:33:51,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:33:51,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:33:51,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:33:51,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:33:51,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:33:51,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:33:51,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:33:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:51,344 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) [2022-03-20 10:33:51,358 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 [2022-03-20 10:33:51,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:33:51,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:33:51,372 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:33:51,372 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:33:51,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:33:51,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:33:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:33:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:33:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:33:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:33:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:33:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:33:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:33:51,418 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:33:51,419 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:33:51,537 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:33:51,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:33:51,541 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 10:33:51,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:51 BoogieIcfgContainer [2022-03-20 10:33:51,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:33:51,543 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:33:51,543 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:33:51,551 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:33:51,553 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:51" (1/1) ... [2022-03-20 10:33:51,554 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:33:51,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:33:51 BasicIcfg [2022-03-20 10:33:51,565 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:33:51,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:33:51,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:33:51,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:33:51,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:33:51" (1/4) ... [2022-03-20 10:33:51,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb324c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:33:51, skipping insertion in model container [2022-03-20 10:33:51,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:51" (2/4) ... [2022-03-20 10:33:51,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb324c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:33:51, skipping insertion in model container [2022-03-20 10:33:51,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:51" (3/4) ... [2022-03-20 10:33:51,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb324c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:33:51, skipping insertion in model container [2022-03-20 10:33:51,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:33:51" (4/4) ... [2022-03-20 10:33:51,573 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.cqvasr [2022-03-20 10:33:51,579 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:33:51,579 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:33:51,623 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:33:51,628 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 [2022-03-20 10:33:51,629 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:33:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 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) [2022-03-20 10:33:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 10:33:51,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:51,645 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:51,646 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:51,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-03-20 10:33:51,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462404701] [2022-03-20 10:33:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:51,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:51,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:51,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:51,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 10:33:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:51,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 10:33:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:51,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462404701] [2022-03-20 10:33:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462404701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:51,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:51,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:33:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111741056] [2022-03-20 10:33:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:51,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:33:51,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:33:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:33:51,872 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:33:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:51,935 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 10:33:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:33:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 10:33:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:51,942 INFO L225 Difference]: With dead ends: 69 [2022-03-20 10:33:51,942 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 10:33:51,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:33:51,946 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:51,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 10:33:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 10:33:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-03-20 10:33:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 10:33:51,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 10:33:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:51,984 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 10:33:51,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:33:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 10:33:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 10:33:51,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:51,987 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:51,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:33:51,988 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-03-20 10:33:51,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:51,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651575019] [2022-03-20 10:33:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 10:33:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 10:33:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:52,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:52,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651575019] [2022-03-20 10:33:52,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651575019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:52,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:52,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405353572] [2022-03-20 10:33:52,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:52,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:52,152 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 10:33:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:52,354 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 10:33:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:33:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 10:33:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:52,356 INFO L225 Difference]: With dead ends: 46 [2022-03-20 10:33:52,356 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 10:33:52,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:52,357 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:52,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 10:33:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 10:33:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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) [2022-03-20 10:33:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 10:33:52,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 10:33:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:52,365 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 10:33:52,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 10:33:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 10:33:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 10:33:52,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:52,366 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-03-20 10:33:52,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 10:33:52,367 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-03-20 10:33:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:52,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135384476] [2022-03-20 10:33:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 10:33:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 10:33:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 10:33:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135384476] [2022-03-20 10:33:52,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135384476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:52,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:52,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861458708] [2022-03-20 10:33:52,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:52,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:52,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:52,451 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:52,608 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 10:33:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:33:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 10:33:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:52,609 INFO L225 Difference]: With dead ends: 50 [2022-03-20 10:33:52,609 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 10:33:52,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:52,610 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:52,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 10:33:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 10:33:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 10:33:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 10:33:52,618 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 10:33:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:52,618 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 10:33:52,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 10:33:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 10:33:52,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:52,619 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-03-20 10:33:52,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 10:33:52,619 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-03-20 10:33:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:52,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174187396] [2022-03-20 10:33:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:52,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826693231] [2022-03-20 10:33:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:52,633 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) [2022-03-20 10:33:52,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:33:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 10:33:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 10:33:52,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174187396] [2022-03-20 10:33:52,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826693231] [2022-03-20 10:33:52,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826693231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:52,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:52,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 10:33:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316267731] [2022-03-20 10:33:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:52,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:33:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:33:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:33:52,820 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 10:33:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:52,916 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 10:33:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:33:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 10:33:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:52,918 INFO L225 Difference]: With dead ends: 69 [2022-03-20 10:33:52,919 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 10:33:52,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:52,927 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:52,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 10:33:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 10:33:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 10:33:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 10:33:52,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 10:33:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:52,943 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 10:33:52,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 10:33:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 10:33:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 10:33:52,944 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:52,944 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-03-20 10:33:52,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:53,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:53,145 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-03-20 10:33:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:53,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406582604] [2022-03-20 10:33:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:53,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:53,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:53,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124156629] [2022-03-20 10:33:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:53,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:53,158 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) [2022-03-20 10:33:53,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:33:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 10:33:53,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 10:33:53,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:33:53,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406582604] [2022-03-20 10:33:53,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124156629] [2022-03-20 10:33:53,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124156629] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:33:53,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:33:53,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 10:33:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521702778] [2022-03-20 10:33:53,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:53,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:33:53,621 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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) [2022-03-20 10:33:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:53,668 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 10:33:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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 45 [2022-03-20 10:33:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:53,671 INFO L225 Difference]: With dead ends: 68 [2022-03-20 10:33:53,672 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 10:33:53,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:33:53,673 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:53,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 10:33:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 10:33:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 10:33:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 10:33:53,696 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 10:33:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:53,696 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 10:33:53,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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) [2022-03-20 10:33:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 10:33:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 10:33:53,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:53,706 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:53,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:53,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:53,920 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-03-20 10:33:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:53,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326549896] [2022-03-20 10:33:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:53,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:53,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90367068] [2022-03-20 10:33:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:53,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:53,936 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) [2022-03-20 10:33:53,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:33:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 10:33:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 10:33:54,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 10:33:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326549896] [2022-03-20 10:33:54,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90367068] [2022-03-20 10:33:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90367068] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:33:54,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:33:54,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 10:33:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208973986] [2022-03-20 10:33:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:54,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:54,291 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-03-20 10:33:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:54,346 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 10:33:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 55 [2022-03-20 10:33:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:54,352 INFO L225 Difference]: With dead ends: 76 [2022-03-20 10:33:54,352 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 10:33:54,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:33:54,353 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:54,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 10:33:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 10:33:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 10:33:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 10:33:54,389 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 10:33:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:54,390 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 10:33:54,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-03-20 10:33:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 10:33:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 10:33:54,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:54,393 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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, 1, 1] [2022-03-20 10:33:54,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:54,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:54,597 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-03-20 10:33:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:54,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666002494] [2022-03-20 10:33:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:54,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:54,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:54,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737517457] [2022-03-20 10:33:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:54,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:54,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:54,607 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) [2022-03-20 10:33:54,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:33:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 10:33:54,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:54,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:54,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666002494] [2022-03-20 10:33:54,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:54,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737517457] [2022-03-20 10:33:54,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737517457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:54,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:54,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:33:54,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889791738] [2022-03-20 10:33:54,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:54,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:54,769 INFO L87 Difference]: Start difference. First operand 71 states and 88 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 10:33:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:54,808 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 10:33:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:54,809 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 10:33:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:54,810 INFO L225 Difference]: With dead ends: 79 [2022-03-20 10:33:54,811 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 10:33:54,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:54,811 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:54,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:54,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 10:33:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 10:33:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 10:33:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 10:33:54,819 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 10:33:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:54,819 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 10:33:54,819 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 10:33:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 10:33:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 10:33:54,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:54,820 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2022-03-20 10:33:54,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:55,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:55,032 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-03-20 10:33:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:55,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357519668] [2022-03-20 10:33:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:55,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:55,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652141146] [2022-03-20 10:33:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:55,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:55,041 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) [2022-03-20 10:33:55,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:33:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 10:33:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 10:33:55,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:34:23,474 WARN L232 SmtUtils]: Spent 14.46s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:35:33,054 WARN L232 SmtUtils]: Spent 24.43s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:36:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 10:36:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357519668] [2022-03-20 10:36:22,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652141146] [2022-03-20 10:36:22,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652141146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:36:22,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:36:22,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-03-20 10:36:22,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40005407] [2022-03-20 10:36:22,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:36:22,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 10:36:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 10:36:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 10:36:22,310 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 10:36:24,336 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 [] [2022-03-20 10:36:31,839 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (<= c_main_~d~0 c_main_~r~0)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (mod c_main_~B~0 4294967296))) (and (let ((.cse1 (* 2 c_main_~p~0)) (.cse3 (* 2 c_main_~d~0))) (or (= .cse0 (+ (* (+ c_main_~q~0 (div .cse1 2)) .cse2) (* (- 1) (div .cse3 2)) c_main_~r~0)) (not (= (* .cse1 .cse2) .cse3)) (not .cse4) (<= .cse3 c_main_~r~0))) (or .cse4 (not (= c_main_~d~0 (* c_main_~p~0 .cse2))) (let ((.cse7 (= (mod c_main_~p~0 2) 0)) (.cse13 (div c_main_~p~0 2))) (let ((.cse9 (* (+ c_main_~q~0 .cse13) .cse2)) (.cse10 (not .cse7)) (.cse5 (* (- 1) (div c_main_~d~0 2))) (.cse6 (* (+ c_main_~q~0 .cse13 1) .cse2)) (.cse12 (= (mod c_main_~d~0 2) 0)) (.cse11 (< c_main_~d~0 0))) (and (or (let ((.cse8 (< c_main_~p~0 0))) (and (or (= .cse0 (+ c_main_~r~0 .cse5 .cse6)) .cse7 (not .cse8)) (or (= .cse0 (+ .cse9 c_main_~r~0 .cse5)) (and .cse10 .cse8)))) (and .cse11 (not .cse12))) (or (and (or (= .cse0 (+ (- 1) .cse9 c_main_~r~0 .cse5)) .cse10) (or .cse7 (= .cse0 (+ (- 1) c_main_~r~0 .cse5 .cse6)))) .cse12 (not .cse11)))))))) is different from true [2022-03-20 10:36:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:36:35,109 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2022-03-20 10:36:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 10:36:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-03-20 10:36:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:36:35,111 INFO L225 Difference]: With dead ends: 144 [2022-03-20 10:36:35,111 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 10:36:35,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=107, Invalid=402, Unknown=1, NotChecked=42, Total=552 [2022-03-20 10:36:35,112 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 131 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-03-20 10:36:35,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 275 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 379 Invalid, 1 Unknown, 5 Unchecked, 7.5s Time] [2022-03-20 10:36:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 10:36:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-03-20 10:36:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 10:36:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 10:36:35,124 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-03-20 10:36:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:36:35,124 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 10:36:35,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 10:36:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 10:36:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 10:36:35,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:36:35,125 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2022-03-20 10:36:35,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:36:35,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:35,326 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:36:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:36:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-03-20 10:36:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:36:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649207433] [2022-03-20 10:36:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:36:35,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:36:35,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813526779] [2022-03-20 10:36:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:35,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:35,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:36:35,337 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) [2022-03-20 10:36:35,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:36:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:36:35,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:36:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:36:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 10:36:35,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:36:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 10:36:35,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:35,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649207433] [2022-03-20 10:36:35,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:35,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813526779] [2022-03-20 10:36:35,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813526779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:36:35,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:36:35,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 10:36:35,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256369850] [2022-03-20 10:36:35,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:36:35,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:36:35,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:35,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:36:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:36:35,799 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 10:36:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:36:35,964 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-03-20 10:36:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:36:35,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 10:36:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:36:35,966 INFO L225 Difference]: With dead ends: 116 [2022-03-20 10:36:35,966 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 10:36:35,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:36:35,966 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:36:35,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 193 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:36:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 10:36:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-03-20 10:36:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 10:36:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-03-20 10:36:35,977 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-03-20 10:36:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:36:35,978 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-03-20 10:36:35,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 10:36:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-03-20 10:36:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 10:36:35,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:36:35,979 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 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] [2022-03-20 10:36:35,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 10:36:36,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:36,179 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:36:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:36:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1406960063, now seen corresponding path program 2 times [2022-03-20 10:36:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:36:36,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545670364] [2022-03-20 10:36:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:36,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:36:36,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:36:36,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365111634] [2022-03-20 10:36:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:36:36,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:36:36,188 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) [2022-03-20 10:36:36,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:36:36,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:36:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:36:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:36:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:36:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 10:36:36,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:36:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 10:36:36,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545670364] [2022-03-20 10:36:36,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:36,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365111634] [2022-03-20 10:36:36,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365111634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:36:36,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:36:36,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-20 10:36:36,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763775686] [2022-03-20 10:36:36,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:36:36,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:36:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:36,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:36:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:36:36,482 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 10:36:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:36:36,532 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-20 10:36:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:36:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-03-20 10:36:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:36:36,534 INFO L225 Difference]: With dead ends: 130 [2022-03-20 10:36:36,534 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 10:36:36,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:36:36,534 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:36:36,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:36:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 10:36:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 10:36:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 10:36:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-03-20 10:36:36,544 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-03-20 10:36:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:36:36,544 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-03-20 10:36:36,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 10:36:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-03-20 10:36:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 10:36:36,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:36:36,545 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 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, 1] [2022-03-20 10:36:36,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:36:36,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:36,755 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:36:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:36:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-03-20 10:36:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:36:36,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536298807] [2022-03-20 10:36:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:36:36,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:36:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325361698] [2022-03-20 10:36:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:36,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:36:36,765 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) [2022-03-20 10:36:36,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:36:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:36:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:36:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:36:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 10:36:37,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:36:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 10:36:37,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536298807] [2022-03-20 10:36:37,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325361698] [2022-03-20 10:36:37,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325361698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:36:37,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:36:37,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 10:36:37,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663618940] [2022-03-20 10:36:37,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:36:37,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 10:36:37,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:37,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 10:36:37,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:36:37,446 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 10:36:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:36:37,714 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2022-03-20 10:36:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:36:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-20 10:36:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:36:37,721 INFO L225 Difference]: With dead ends: 119 [2022-03-20 10:36:37,721 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 10:36:37,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:36:37,722 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:36:37,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 324 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:36:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 10:36:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 10:36:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 10:36:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-20 10:36:37,733 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-03-20 10:36:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:36:37,733 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-20 10:36:37,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 10:36:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-20 10:36:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 10:36:37,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:36:37,734 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1] [2022-03-20 10:36:37,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:36:37,935 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,SelfDestructingSolverStorable10 [2022-03-20 10:36:37,935 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:36:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:36:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1871497790, now seen corresponding path program 1 times [2022-03-20 10:36:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:36:37,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308419432] [2022-03-20 10:36:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:36:37,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:36:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705858840] [2022-03-20 10:36:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:37,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:37,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:36:37,962 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) [2022-03-20 10:36:37,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:36:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:36:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 10:36:38,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:36:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-20 10:36:38,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:36:38,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308419432] [2022-03-20 10:36:38,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705858840] [2022-03-20 10:36:38,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705858840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:36:38,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:36:38,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:36:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598829031] [2022-03-20 10:36:38,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:36:38,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:36:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:38,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:36:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:36:38,170 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 10:36:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:36:38,276 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-03-20 10:36:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:36:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-03-20 10:36:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:36:38,279 INFO L225 Difference]: With dead ends: 116 [2022-03-20 10:36:38,279 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 10:36:38,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:36:38,280 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:36:38,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:36:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 10:36:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 10:36:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 10:36:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-03-20 10:36:38,295 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-03-20 10:36:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:36:38,296 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-03-20 10:36:38,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 10:36:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-03-20 10:36:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 10:36:38,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:36:38,298 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:36:38,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 10:36:38,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:38,516 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:36:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:36:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2022-03-20 10:36:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:36:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851350818] [2022-03-20 10:36:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:36:38,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:36:38,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:36:38,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645317777] [2022-03-20 10:36:38,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:36:38,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:36:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:36:38,529 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) [2022-03-20 10:36:38,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 10:36:38,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 10:36:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:36:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 10:36:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:36:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-20 10:36:39,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 31 proven. 51 refuted. 4 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 10:37:32,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851350818] [2022-03-20 10:37:32,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645317777] [2022-03-20 10:37:32,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645317777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:37:32,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:37:32,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-20 10:37:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726919819] [2022-03-20 10:37:32,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:32,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 10:37:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:32,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 10:37:32,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=416, Unknown=5, NotChecked=0, Total=506 [2022-03-20 10:37:32,004 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-20 10:38:40,866 WARN L232 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:38:42,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:38:44,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:40:50,333 WARN L232 SmtUtils]: Spent 2.04m on a formula simplification. DAG size of input: 172 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:41:57,466 WARN L232 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 195 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:41:59,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:42:06,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:43:37,005 WARN L232 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 181 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:43:54,192 WARN L232 SmtUtils]: Spent 13.77s on a formula simplification. DAG size of input: 85 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:44:02,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:44:13,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:44:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:44:14,424 INFO L93 Difference]: Finished difference Result 236 states and 308 transitions. [2022-03-20 10:44:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 10:44:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-03-20 10:44:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:44:14,427 INFO L225 Difference]: With dead ends: 236 [2022-03-20 10:44:14,427 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 10:44:14,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 392.4s TimeCoverageRelationStatistics Valid=282, Invalid=1352, Unknown=6, NotChecked=0, Total=1640 [2022-03-20 10:44:14,428 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 118 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 265 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-03-20 10:44:14,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 711 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1071 Invalid, 4 Unknown, 0 Unchecked, 26.9s Time] [2022-03-20 10:44:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 10:44:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2022-03-20 10:44:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 96 states have (on average 1.125) internal successors, (108), 103 states have internal predecessors, (108), 46 states have call successors, (46), 19 states have call predecessors, (46), 18 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 10:44:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 198 transitions. [2022-03-20 10:44:14,442 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 198 transitions. Word has length 105 [2022-03-20 10:44:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:44:14,443 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 198 transitions. [2022-03-20 10:44:14,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-20 10:44:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 198 transitions. [2022-03-20 10:44:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 10:44:14,444 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:44:14,444 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 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, 1, 1] [2022-03-20 10:44:14,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 10:44:14,660 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,SelfDestructingSolverStorable12 [2022-03-20 10:44:14,661 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:44:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:44:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-03-20 10:44:14,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:44:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177008372] [2022-03-20 10:44:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:44:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:44:14,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:44:14,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192597275] [2022-03-20 10:44:14,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:44:14,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:44:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:44:14,684 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) [2022-03-20 10:44:14,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 10:44:14,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:44:14,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:44:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 10:44:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:44:15,544 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 10:44:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 10:44:16,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:44:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 10:44:16,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:44:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177008372] [2022-03-20 10:44:16,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:44:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192597275] [2022-03-20 10:44:16,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192597275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:44:16,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:44:16,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-20 10:44:16,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813579980] [2022-03-20 10:44:16,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:44:16,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 10:44:16,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:44:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 10:44:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-20 10:44:16,645 INFO L87 Difference]: Start difference. First operand 161 states and 198 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 10:44:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:44:17,897 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2022-03-20 10:44:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 10:44:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-03-20 10:44:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:44:17,899 INFO L225 Difference]: With dead ends: 228 [2022-03-20 10:44:17,899 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 10:44:17,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-20 10:44:17,900 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 43 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:44:17,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 410 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 10:44:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 10:44:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 138. [2022-03-20 10:44:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 89 states have internal predecessors, (93), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 10:44:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2022-03-20 10:44:17,912 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 116 [2022-03-20 10:44:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:44:17,912 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2022-03-20 10:44:17,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 10:44:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2022-03-20 10:44:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 10:44:17,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:44:17,913 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:44:17,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 10:44:18,127 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,SelfDestructingSolverStorable13 [2022-03-20 10:44:18,127 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:44:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:44:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -715358301, now seen corresponding path program 4 times [2022-03-20 10:44:18,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:44:18,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173947380] [2022-03-20 10:44:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:44:18,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:44:18,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:44:18,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461171103] [2022-03-20 10:44:18,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:44:18,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:44:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:44:18,136 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) [2022-03-20 10:44:18,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 10:44:18,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:44:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:44:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 10:44:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:44:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 10:44:19,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:44:42,762 WARN L232 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:45:15,382 WARN L232 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:46:34,233 WARN L232 SmtUtils]: Spent 32.39s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:48:21,238 WARN L232 SmtUtils]: Spent 15.95s on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)