/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/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:18:44,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:18:44,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:18:44,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:18:44,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:18:44,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:18:44,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:18:44,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:18:44,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:18:44,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:18:44,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:18:44,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:18:44,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:18:44,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:18:44,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:18:44,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:18:44,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:18:44,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:18:44,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:18:44,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:18:44,588 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:18:44,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:18:44,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:18:44,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:18:44,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:18:44,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 10:18:44,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 10:18:44,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 10:18:44,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 10:18:44,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 10:18:44,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 10:18:44,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 10:18:44,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 10:18:44,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 10:18:44,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 10:18:44,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 10:18:44,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 10:18:44,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 10:18:44,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 10:18:44,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:18:44,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:18:44,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:18:44,603 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 10:18:44,623 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:18:44,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:18:44,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:18:44,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:18:44,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:18:44,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:18:44,625 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:18:44,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:18:44,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:18:44,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:18:44,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:18:44,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:18:44,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:18:44,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:18:44,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:18:44,628 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:18:44,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:18:44,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:18:44,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:18:44,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:18:44,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:18:44,842 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:18:44,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-03-20 10:18:44,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa70c6d1/e47c03e110714dc1b299b01f91fa1a76/FLAG7692c5f29 [2022-03-20 10:18:45,218 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:18:45,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-03-20 10:18:45,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa70c6d1/e47c03e110714dc1b299b01f91fa1a76/FLAG7692c5f29 [2022-03-20 10:18:45,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa70c6d1/e47c03e110714dc1b299b01f91fa1a76 [2022-03-20 10:18:45,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:18:45,235 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:18:45,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:18:45,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:18:45,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:18:45,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c54038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45, skipping insertion in model container [2022-03-20 10:18:45,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:18:45,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:18:45,367 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/egcd3-ll_valuebound1.c[490,503] [2022-03-20 10:18:45,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:18:45,384 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:18:45,391 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/egcd3-ll_valuebound1.c[490,503] [2022-03-20 10:18:45,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:18:45,405 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:18:45,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45 WrapperNode [2022-03-20 10:18:45,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:18:45,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:18:45,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:18:45,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:18:45,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:18:45,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:18:45,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:18:45,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:18:45,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:18:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:45,448 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 10:18:45,454 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 10:18:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:18:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:18:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:18:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:18:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:18:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:18:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:18:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:18:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:18:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:18:45,515 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:18:45,516 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:18:45,615 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:18:45,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:18:45,620 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 10:18:45,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:18:45 BoogieIcfgContainer [2022-03-20 10:18:45,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:18:45,621 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:18:45,621 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:18:45,622 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:18:45,624 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:18:45" (1/1) ... [2022-03-20 10:18:45,630 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:18:45,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:18:45 BasicIcfg [2022-03-20 10:18:45,642 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:18:45,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:18:45,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:18:45,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:18:45,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:18:45" (1/4) ... [2022-03-20 10:18:45,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8e36ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:18:45, skipping insertion in model container [2022-03-20 10:18:45,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:45" (2/4) ... [2022-03-20 10:18:45,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8e36ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:18:45, skipping insertion in model container [2022-03-20 10:18:45,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:18:45" (3/4) ... [2022-03-20 10:18:45,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8e36ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:18:45, skipping insertion in model container [2022-03-20 10:18:45,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:18:45" (4/4) ... [2022-03-20 10:18:45,651 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.cqvasr [2022-03-20 10:18:45,654 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:18:45,654 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:18:45,683 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:18:45,706 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 10:18:45,706 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:18:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 10:18:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 10:18:45,721 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:45,721 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:45,722 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-20 10:18:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:45,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603427347] [2022-03-20 10:18:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:18:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:18:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 10:18:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 10:18:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 10:18:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:18:45,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:45,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603427347] [2022-03-20 10:18:45,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603427347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:45,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:45,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:18:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52406609] [2022-03-20 10:18:45,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:45,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:18:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:45,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:18:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:18:45,928 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:46,016 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 10:18:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:18:46,018 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 10:18:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:46,024 INFO L225 Difference]: With dead ends: 73 [2022-03-20 10:18:46,024 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 10:18:46,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 10:18:46,029 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:46,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 10:18:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 10:18:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:18:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 10:18:46,067 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 10:18:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:46,067 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 10:18:46,068 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 10:18:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 10:18:46,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:46,070 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:46,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:18:46,071 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-20 10:18:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773344082] [2022-03-20 10:18:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:46,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:46,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011929893] [2022-03-20 10:18:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:46,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:46,117 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 10:18:46,151 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 10:18:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:18:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:18:46,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:46,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773344082] [2022-03-20 10:18:46,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:46,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011929893] [2022-03-20 10:18:46,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011929893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:46,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:46,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:18:46,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285156729] [2022-03-20 10:18:46,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:46,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:18:46,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:18:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:46,258 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:18:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:46,313 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 10:18:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:18:46,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 10:18:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:46,315 INFO L225 Difference]: With dead ends: 54 [2022-03-20 10:18:46,315 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 10:18:46,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:18:46,316 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:46,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 10:18:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-20 10:18:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:18:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 10:18:46,324 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-20 10:18:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:46,324 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 10:18:46,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:18:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 10:18:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 10:18:46,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:46,325 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:46,347 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 10:18:46,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:46,543 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-20 10:18:46,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:46,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797137760] [2022-03-20 10:18:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:46,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106745405] [2022-03-20 10:18:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:46,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:46,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:46,574 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 10:18:46,576 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 10:18:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 10:18:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:18:46,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:18:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797137760] [2022-03-20 10:18:47,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106745405] [2022-03-20 10:18:47,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106745405] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:18:47,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:18:47,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-20 10:18:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008102104] [2022-03-20 10:18:47,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:47,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 10:18:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 10:18:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:18:47,086 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:18:47,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:47,137 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-20 10:18:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:18:47,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-20 10:18:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:47,140 INFO L225 Difference]: With dead ends: 53 [2022-03-20 10:18:47,140 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 10:18:47,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 10:18:47,142 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:47,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 10:18:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 10:18:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:18:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 10:18:47,155 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-20 10:18:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:47,155 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 10:18:47,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:18:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 10:18:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 10:18:47,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:47,156 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:47,173 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 10:18:47,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 10:18:47,370 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-20 10:18:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472920784] [2022-03-20 10:18:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:47,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:47,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582195851] [2022-03-20 10:18:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:47,400 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 10:18:47,402 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 10:18:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:47,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:18:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:18:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:18:47,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472920784] [2022-03-20 10:18:47,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582195851] [2022-03-20 10:18:47,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582195851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:47,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:47,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 10:18:47,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161831403] [2022-03-20 10:18:47,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:47,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:18:47,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:47,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:18:47,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:18:47,593 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:47,728 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 10:18:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:18:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 10:18:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:47,730 INFO L225 Difference]: With dead ends: 103 [2022-03-20 10:18:47,730 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 10:18:47,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:18:47,731 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:47,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 341 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 10:18:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 10:18:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 10:18:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 10:18:47,741 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 10:18:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:47,742 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 10:18:47,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 10:18:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:18:47,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:47,743 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:47,766 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 10:18:47,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:47,957 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-20 10:18:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:47,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084407778] [2022-03-20 10:18:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:47,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:47,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:47,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930630401] [2022-03-20 10:18:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:47,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:47,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:47,969 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 10:18:47,970 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 10:18:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 10:18:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:18:48,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084407778] [2022-03-20 10:18:48,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930630401] [2022-03-20 10:18:48,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930630401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:18:48,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:18:48,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 10:18:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150212388] [2022-03-20 10:18:48,219 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:48,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:18:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:18:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:18:48,219 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:48,296 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-20 10:18:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:18:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 10:18:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:48,297 INFO L225 Difference]: With dead ends: 79 [2022-03-20 10:18:48,298 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 10:18:48,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:18:48,298 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:48,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 201 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 10:18:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 10:18:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 10:18:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-20 10:18:48,307 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-20 10:18:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:48,307 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-20 10:18:48,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-20 10:18:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:18:48,308 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:48,308 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:48,327 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 10:18:48,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:48,523 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-20 10:18:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:48,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034483205] [2022-03-20 10:18:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:48,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:48,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379019889] [2022-03-20 10:18:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:48,540 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 10:18:48,541 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 10:18:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 10:18:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:18:48,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:18:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034483205] [2022-03-20 10:18:48,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379019889] [2022-03-20 10:18:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379019889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:48,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:48,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2022-03-20 10:18:48,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942743316] [2022-03-20 10:18:48,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:48,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 10:18:48,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 10:18:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-20 10:18:48,890 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 10:18:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:49,059 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2022-03-20 10:18:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 10:18:49,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2022-03-20 10:18:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:49,060 INFO L225 Difference]: With dead ends: 102 [2022-03-20 10:18:49,060 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 10:18:49,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-20 10:18:49,061 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:49,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 269 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 10:18:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-03-20 10:18:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:18:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-03-20 10:18:49,089 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2022-03-20 10:18:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:49,090 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-03-20 10:18:49,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 10:18:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-03-20 10:18:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 10:18:49,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:49,091 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:49,109 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 10:18:49,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:49,309 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-20 10:18:49,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:49,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62820417] [2022-03-20 10:18:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:49,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:49,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:49,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579437608] [2022-03-20 10:18:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:49,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:49,331 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 10:18:49,332 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 10:18:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:18:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:18:49,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:49,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62820417] [2022-03-20 10:18:49,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579437608] [2022-03-20 10:18:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579437608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:49,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:49,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:18:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425131194] [2022-03-20 10:18:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:49,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:49,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:49,432 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:18:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:49,468 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-20 10:18:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:18:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 47 [2022-03-20 10:18:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:49,470 INFO L225 Difference]: With dead ends: 79 [2022-03-20 10:18:49,470 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 10:18:49,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 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 10:18:49,472 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:49,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 10:18:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-03-20 10:18:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 10:18:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-03-20 10:18:49,494 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 47 [2022-03-20 10:18:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:49,495 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-03-20 10:18:49,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:18:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-03-20 10:18:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 10:18:49,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:49,499 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:49,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 10:18:49,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:49,718 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-20 10:18:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:49,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3589578] [2022-03-20 10:18:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:49,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:49,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979939815] [2022-03-20 10:18:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:49,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:49,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:49,727 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 10:18:49,728 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 10:18:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 10:18:49,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 10:18:49,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 10:18:49,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3589578] [2022-03-20 10:18:49,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979939815] [2022-03-20 10:18:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979939815] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:18:49,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:18:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 10:18:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13798662] [2022-03-20 10:18:49,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:49,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:49,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:18:49,997 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 10:18:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:50,062 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-03-20 10:18:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:18:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 10:18:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:50,063 INFO L225 Difference]: With dead ends: 81 [2022-03-20 10:18:50,063 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 10:18:50,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:18:50,064 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:50,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 10:18:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-20 10:18:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 10:18:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-03-20 10:18:50,071 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 52 [2022-03-20 10:18:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:50,071 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-03-20 10:18:50,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 10:18:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-03-20 10:18:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 10:18:50,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:50,072 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:50,088 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 10:18:50,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:50,287 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-20 10:18:50,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082693414] [2022-03-20 10:18:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:50,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:50,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572429865] [2022-03-20 10:18:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:50,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:50,297 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 10:18:50,298 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 10:18:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 10:18:50,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 10:18:50,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 10:18:51,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082693414] [2022-03-20 10:18:51,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572429865] [2022-03-20 10:18:51,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572429865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:51,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:51,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-03-20 10:18:51,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854737266] [2022-03-20 10:18:51,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:51,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 10:18:51,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 10:18:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-20 10:18:51,771 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 10:19:00,762 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 10:19:02,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:03,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:19:06,004 INFO L93 Difference]: Finished difference Result 283 states and 410 transitions. [2022-03-20 10:19:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 10:19:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 64 [2022-03-20 10:19:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:19:06,010 INFO L225 Difference]: With dead ends: 283 [2022-03-20 10:19:06,010 INFO L226 Difference]: Without dead ends: 246 [2022-03-20 10:19:06,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=577, Invalid=2845, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 10:19:06,014 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 201 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 288 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:19:06,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 675 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1443 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-03-20 10:19:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-20 10:19:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 180. [2022-03-20 10:19:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 108 states have (on average 1.25) internal successors, (135), 110 states have internal predecessors, (135), 61 states have call successors, (61), 11 states have call predecessors, (61), 10 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 10:19:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 254 transitions. [2022-03-20 10:19:06,054 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 254 transitions. Word has length 64 [2022-03-20 10:19:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:19:06,054 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 254 transitions. [2022-03-20 10:19:06,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 10:19:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 254 transitions. [2022-03-20 10:19:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 10:19:06,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:19:06,057 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:19:06,074 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 10:19:06,259 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,SelfDestructingSolverStorable8 [2022-03-20 10:19:06,260 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:19:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:19:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash 248272623, now seen corresponding path program 2 times [2022-03-20 10:19:06,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:19:06,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283565889] [2022-03-20 10:19:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:06,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:19:06,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:19:06,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085306031] [2022-03-20 10:19:06,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:19:06,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:19:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:19:06,276 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 10:19:06,277 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 10:19:06,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:19:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:19:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:19:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:19:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 10:19:06,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:19:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 10:19:06,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:19:06,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283565889] [2022-03-20 10:19:06,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:19:06,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085306031] [2022-03-20 10:19:06,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085306031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:19:06,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:19:06,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 10:19:06,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228545672] [2022-03-20 10:19:06,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:19:06,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 10:19:06,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:19:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 10:19:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:19:06,564 INFO L87 Difference]: Start difference. First operand 180 states and 254 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 10:19:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:19:06,815 INFO L93 Difference]: Finished difference Result 286 states and 399 transitions. [2022-03-20 10:19:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 10:19:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 69 [2022-03-20 10:19:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:19:06,816 INFO L225 Difference]: With dead ends: 286 [2022-03-20 10:19:06,816 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 10:19:06,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:19:06,817 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 58 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:19:06,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 323 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:19:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 10:19:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 174. [2022-03-20 10:19:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 59 states have call successors, (59), 10 states have call predecessors, (59), 9 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-03-20 10:19:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 240 transitions. [2022-03-20 10:19:06,867 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 240 transitions. Word has length 69 [2022-03-20 10:19:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:19:06,868 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 240 transitions. [2022-03-20 10:19:06,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 10:19:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 240 transitions. [2022-03-20 10:19:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 10:19:06,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:19:06,870 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 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, 1, 1, 1] [2022-03-20 10:19:06,887 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 10:19:07,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 10:19:07,083 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:19:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:19:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1757299226, now seen corresponding path program 1 times [2022-03-20 10:19:07,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:19:07,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217309100] [2022-03-20 10:19:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:19:07,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:19:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385488493] [2022-03-20 10:19:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:07,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:19:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:19:07,100 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 10:19:07,104 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 10:19:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:19:07,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 10:19:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:19:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 10:19:07,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:19:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 10:19:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:19:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217309100] [2022-03-20 10:19:07,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:19:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385488493] [2022-03-20 10:19:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385488493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:19:07,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:19:07,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 10:19:07,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133416630] [2022-03-20 10:19:07,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:19:07,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:19:07,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:19:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:19:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:19:07,513 INFO L87 Difference]: Start difference. First operand 174 states and 240 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 10:19:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:19:07,672 INFO L93 Difference]: Finished difference Result 242 states and 333 transitions. [2022-03-20 10:19:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 10:19:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 72 [2022-03-20 10:19:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:19:07,673 INFO L225 Difference]: With dead ends: 242 [2022-03-20 10:19:07,673 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 10:19:07,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-03-20 10:19:07,674 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 63 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:19:07,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 285 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:19:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 10:19:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-20 10:19:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 80 states have (on average 1.1625) internal successors, (93), 81 states have internal predecessors, (93), 43 states have call successors, (43), 9 states have call predecessors, (43), 8 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 10:19:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2022-03-20 10:19:07,695 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 72 [2022-03-20 10:19:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:19:07,695 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2022-03-20 10:19:07,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 10:19:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2022-03-20 10:19:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 10:19:07,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:19:07,696 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 10:19:07,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 10:19:07,911 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,SelfDestructingSolverStorable10 [2022-03-20 10:19:07,911 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:19:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:19:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2022-03-20 10:19:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:19:07,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252895898] [2022-03-20 10:19:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:19:07,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:19:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010469782] [2022-03-20 10:19:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:19:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:19:07,923 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 10:19:07,924 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 10:19:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:19:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 10:19:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:19:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-20 10:19:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:19:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-20 10:19:08,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:19:08,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252895898] [2022-03-20 10:19:08,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:19:08,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010469782] [2022-03-20 10:19:08,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010469782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:19:08,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:19:08,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 10:19:08,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854587689] [2022-03-20 10:19:08,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:19:08,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 10:19:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:19:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 10:19:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 10:19:08,494 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 10:19:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:19:08,642 INFO L93 Difference]: Finished difference Result 144 states and 186 transitions. [2022-03-20 10:19:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:19:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 86 [2022-03-20 10:19:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:19:08,642 INFO L225 Difference]: With dead ends: 144 [2022-03-20 10:19:08,642 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 10:19:08,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-20 10:19:08,643 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:19:08,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 262 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:19:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 10:19:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 10:19:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 10:19:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 10:19:08,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-03-20 10:19:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:19:08,644 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 10:19:08,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 10:19:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 10:19:08,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 10:19:08,646 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 10:19:08,664 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 10:19:08,847 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,SelfDestructingSolverStorable11 [2022-03-20 10:19:08,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 10:19:09,808 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 10:19:09,808 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 10:19:09,808 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 10:19:09,808 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 10:19:09,809 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 10:19:09,809 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 10:19:09,809 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 10:19:09,809 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-20 10:19:09,809 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-20 10:19:09,809 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-03-20 10:19:09,809 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-03-20 10:19:09,809 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-03-20 10:19:09,809 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-03-20 10:19:09,810 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-03-20 10:19:09,810 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-03-20 10:19:09,810 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-03-20 10:19:09,810 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-03-20 10:19:09,810 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-03-20 10:19:09,810 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) .cse0 (= main_~p~0 1)) (and (< main_~b~0 1) (= main_~p~0 0) (< (div main_~x~0 2) main_~a~0) (= main_~r~0 1) (= main_~a~0 main_~y~0) (<= main_~a~0 main_~x~0) (<= main_~b~0 main_~c~0) (<= 0 main_~b~0) (= main_~q~0 1) (<= main_~c~0 main_~b~0) (= (+ main_~s~0 1) 0) .cse0))) [2022-03-20 10:19:09,810 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (<= 1 main_~x~0) (= main_~b~0 0) (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~b~0 main_~c~0) (<= 1 main_~y~0) (<= main_~y~0 1)) [2022-03-20 10:19:09,810 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-03-20 10:19:09,810 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse2 (<= 1 main_~a~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~q~0 0)) (.cse5 (= main_~a~0 main_~x~0)) (.cse6 (<= main_~y~0 1)) (.cse7 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) (<= main_~v~0 main_~b~0) (< main_~c~0 (* main_~v~0 2)) .cse0 .cse1 .cse2 (<= 0 main_~c~0) .cse3 (= main_~k~0 1) (< (div main_~x~0 2) main_~b~0) .cse4 (< main_~c~0 main_~b~0) .cse5 .cse6 .cse7) (and (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 (<= 1 main_~y~0) .cse5 (<= main_~c~0 1) (= main_~c~0 main_~x~0) .cse6 .cse7))) [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-03-20 10:19:09,811 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-03-20 10:19:09,811 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-03-20 10:19:09,811 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-03-20 10:19:09,811 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-03-20 10:19:09,812 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-03-20 10:19:09,812 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-03-20 10:19:09,812 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-03-20 10:19:09,814 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:19:09,814 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 10:19:09,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:19:09 BasicIcfg [2022-03-20 10:19:09,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 10:19:09,836 INFO L158 Benchmark]: Toolchain (without parser) took 24600.29ms. Allocated memory was 210.8MB in the beginning and 306.2MB in the end (delta: 95.4MB). Free memory was 159.2MB in the beginning and 134.1MB in the end (delta: 25.1MB). Peak memory consumption was 121.4MB. Max. memory is 8.0GB. [2022-03-20 10:19:09,836 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 210.8MB. Free memory was 175.4MB in the beginning and 175.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 10:19:09,836 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.29ms. Allocated memory is still 210.8MB. Free memory was 158.9MB in the beginning and 185.5MB in the end (delta: -26.6MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-03-20 10:19:09,837 INFO L158 Benchmark]: Boogie Preprocessor took 18.21ms. Allocated memory is still 210.8MB. Free memory was 185.5MB in the beginning and 183.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 10:19:09,837 INFO L158 Benchmark]: RCFGBuilder took 196.42ms. Allocated memory is still 210.8MB. Free memory was 183.9MB in the beginning and 171.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 10:19:09,837 INFO L158 Benchmark]: IcfgTransformer took 20.84ms. Allocated memory is still 210.8MB. Free memory was 171.8MB in the beginning and 170.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 10:19:09,837 INFO L158 Benchmark]: TraceAbstraction took 24187.89ms. Allocated memory was 210.8MB in the beginning and 306.2MB in the end (delta: 95.4MB). Free memory was 169.7MB in the beginning and 134.1MB in the end (delta: 35.6MB). Peak memory consumption was 131.5MB. Max. memory is 8.0GB. [2022-03-20 10:19:09,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 210.8MB. Free memory was 175.4MB in the beginning and 175.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 169.29ms. Allocated memory is still 210.8MB. Free memory was 158.9MB in the beginning and 185.5MB in the end (delta: -26.6MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.21ms. Allocated memory is still 210.8MB. Free memory was 185.5MB in the beginning and 183.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 196.42ms. Allocated memory is still 210.8MB. Free memory was 183.9MB in the beginning and 171.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 20.84ms. Allocated memory is still 210.8MB. Free memory was 171.8MB in the beginning and 170.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 24187.89ms. Allocated memory was 210.8MB in the beginning and 306.2MB in the end (delta: 95.4MB). Free memory was 169.7MB in the beginning and 134.1MB in the end (delta: 35.6MB). Peak memory consumption was 131.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.1s, OverallIterations: 12, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 15.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 634 SdHoareTripleChecker+Valid, 9.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 583 mSDsluCounter, 3076 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2550 mSDsCounter, 586 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2464 IncrementalHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 586 mSolverCounterUnsat, 526 mSDtfsCounter, 2464 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1135 GetRequests, 936 SyntacticMatches, 7 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=9, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 134 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 151 PreInvPairs, 170 NumberOfFragments, 489 HoareAnnotationTreeSize, 151 FomulaSimplifications, 36 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 2652 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 617 NumberOfCodeBlocks, 617 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1058 ConstructedInterpolants, 0 QuantifiedInterpolants, 3872 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1688 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 968/1098 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((k == 0 && v <= c) && s == 1) && a == y * r + p * x) && b == y) && b <= v) && d == 1) && q == 0) && 1 <= y) && a == x) && c <= 1) && c == x) && p == 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((s == 1 && a == y * r + p * x) && x <= 1) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 1) && p == 1) || (((((((((((b < 1 && p == 0) && x / 2 < a) && r == 1) && a == y) && a <= x) && b <= c) && 0 <= b) && q == 1) && c <= b) && s + 1 == 0) && y <= 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((v == d * b && v <= b) && c < v * 2) && s == 1) && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && k == 1) && x / 2 < b) && q == 0) && c < b) && a == x) && y <= 1) && p == 1) || (((((((((((k == 0 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c <= 1) && c == x) && y <= 1) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-03-20 10:19:09,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...