/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/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:44:31,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:44:31,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:44:31,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:44:31,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:44:31,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:44:31,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:44:31,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:44:31,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:44:31,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:44:31,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:44:31,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:44:31,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:44:31,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:44:31,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:44:31,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:44:31,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:44:31,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:44:31,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:44:31,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:44:31,305 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:44:31,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:44:31,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:44:31,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:44:31,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:44:31,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 22:44:31,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 22:44:31,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 22:44:31,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 22:44:31,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 22:44:31,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 22:44:31,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 22:44:31,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 22:44:31,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 22:44:31,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 22:44:31,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 22:44:31,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 22:44:31,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 22:44:31,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 22:44:31,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:44:31,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:44:31,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:44:31,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:44:31,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:44:31,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:44:31,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:44:31,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:44:31,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:44:31,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:44:31,341 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:44:31,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:44:31,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:44:31,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:44:31,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:44:31,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:44:31,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:44:31,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:44:31,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:44:31,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:44:31,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:44:31,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:44:31,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:44:31,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:44:31,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:44:31,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:44:31,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:44:31,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:44:31,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:44:31,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:44:31,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:44:31,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:44:31,344 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:44:31,345 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:44:31,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:44:31,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:44:31,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:44:31,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:44:31,534 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:44:31,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2022-03-18 22:44:31,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a491adc89/370ab21978744b25aed66615066a8e0d/FLAG1c3ef1466 [2022-03-18 22:44:31,893 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:44:31,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2022-03-18 22:44:31,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a491adc89/370ab21978744b25aed66615066a8e0d/FLAG1c3ef1466 [2022-03-18 22:44:32,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a491adc89/370ab21978744b25aed66615066a8e0d [2022-03-18 22:44:32,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:44:32,319 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:44:32,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:44:32,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:44:32,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:44:32,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f99acfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32, skipping insertion in model container [2022-03-18 22:44:32,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:44:32,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:44:32,463 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/hard2.c[526,539] [2022-03-18 22:44:32,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:44:32,478 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:44:32,485 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/hard2.c[526,539] [2022-03-18 22:44:32,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:44:32,497 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:44:32,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32 WrapperNode [2022-03-18 22:44:32,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:44:32,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:44:32,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:44:32,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:44:32,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:44:32,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:44:32,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:44:32,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:44:32,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:44:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:32,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 22:44:32,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 22:44:32,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:44:32,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:44:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:44:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 22:44:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:44:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:44:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:44:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:44:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:44:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:44:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:44:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:44:32,626 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:44:32,627 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:44:32,752 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:44:32,756 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:44:32,757 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 22:44:32,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:44:32 BoogieIcfgContainer [2022-03-18 22:44:32,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:44:32,758 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:44:32,758 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:44:32,759 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:44:32,761 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:44:32" (1/1) ... [2022-03-18 22:44:32,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:44:32 BasicIcfg [2022-03-18 22:44:32,772 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:44:32,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:44:32,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:44:32,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:44:32,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:44:32" (1/4) ... [2022-03-18 22:44:32,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac2943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:44:32, skipping insertion in model container [2022-03-18 22:44:32,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:44:32" (2/4) ... [2022-03-18 22:44:32,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac2943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:44:32, skipping insertion in model container [2022-03-18 22:44:32,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:44:32" (3/4) ... [2022-03-18 22:44:32,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac2943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:44:32, skipping insertion in model container [2022-03-18 22:44:32,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:44:32" (4/4) ... [2022-03-18 22:44:32,779 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.cqvasr [2022-03-18 22:44:32,782 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:44:32,783 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:44:32,828 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:44:32,832 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 22:44:32,833 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:44:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 22:44:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 22:44:32,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:32,846 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:32,847 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1059151250, now seen corresponding path program 1 times [2022-03-18 22:44:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:32,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658043458] [2022-03-18 22:44:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:33,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:33,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658043458] [2022-03-18 22:44:33,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658043458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:33,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:33,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 22:44:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056538460] [2022-03-18 22:44:33,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:33,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 22:44:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:33,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 22:44:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:44:33,134 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:44:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:33,331 INFO L93 Difference]: Finished difference Result 66 states and 111 transitions. [2022-03-18 22:44:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:44:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 22:44:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:33,346 INFO L225 Difference]: With dead ends: 66 [2022-03-18 22:44:33,346 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 22:44:33,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:44:33,358 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:33,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:44:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 22:44:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-03-18 22:44:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:44:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-03-18 22:44:33,389 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2022-03-18 22:44:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:33,390 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-03-18 22:44:33,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:44:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-03-18 22:44:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 22:44:33,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:33,391 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:33,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:44:33,391 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2043934920, now seen corresponding path program 1 times [2022-03-18 22:44:33,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595489635] [2022-03-18 22:44:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:33,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:44:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 22:44:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:44:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:33,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595489635] [2022-03-18 22:44:33,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595489635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:33,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:33,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 22:44:33,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196577922] [2022-03-18 22:44:33,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:33,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 22:44:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:33,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 22:44:33,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:44:33,456 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 22:44:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:33,565 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-03-18 22:44:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:44:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-03-18 22:44:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:33,568 INFO L225 Difference]: With dead ends: 41 [2022-03-18 22:44:33,568 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 22:44:33,568 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:44:33,569 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:33,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:44:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 22:44:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-03-18 22:44:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:44:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-18 22:44:33,575 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2022-03-18 22:44:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:33,575 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-18 22:44:33,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 22:44:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-18 22:44:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 22:44:33,576 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:33,576 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:33,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:44:33,576 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:33,577 INFO L85 PathProgramCache]: Analyzing trace with hash 106953131, now seen corresponding path program 1 times [2022-03-18 22:44:33,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:33,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869616553] [2022-03-18 22:44:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:33,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947630114] [2022-03-18 22:44:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:33,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:33,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:33,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:33,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:44:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 22:44:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:44:33,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:44:33,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:33,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869616553] [2022-03-18 22:44:33,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:33,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947630114] [2022-03-18 22:44:33,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947630114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:33,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:33,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 22:44:33,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983509786] [2022-03-18 22:44:33,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:33,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:44:33,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:44:33,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:44:33,753 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:33,799 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-03-18 22:44:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:44:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-03-18 22:44:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:33,801 INFO L225 Difference]: With dead ends: 60 [2022-03-18 22:44:33,801 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 22:44:33,801 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:44:33,804 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:33,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:44:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 22:44:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-18 22:44:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 22:44:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-03-18 22:44:33,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-03-18 22:44:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:33,811 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-03-18 22:44:33,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:44:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-03-18 22:44:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 22:44:33,815 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:33,815 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:33,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 22:44:34,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:34,032 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 606156080, now seen corresponding path program 1 times [2022-03-18 22:44:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:34,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379269866] [2022-03-18 22:44:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:34,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684878045] [2022-03-18 22:44:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:34,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:34,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:44:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:44:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:44:34,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:44:34,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:34,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379269866] [2022-03-18 22:44:34,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:34,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684878045] [2022-03-18 22:44:34,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684878045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:34,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:34,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 22:44:34,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105058730] [2022-03-18 22:44:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:34,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:44:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:44:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:44:34,184 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:44:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:34,225 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-03-18 22:44:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:44:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 22:44:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:34,228 INFO L225 Difference]: With dead ends: 59 [2022-03-18 22:44:34,228 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 22:44:34,229 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:44:34,232 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:34,234 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:44:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 22:44:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-18 22:44:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 22:44:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-03-18 22:44:34,252 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 28 [2022-03-18 22:44:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:34,252 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-03-18 22:44:34,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:44:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-03-18 22:44:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 22:44:34,253 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:34,253 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:34,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:34,467 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,SelfDestructingSolverStorable3 [2022-03-18 22:44:34,468 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 312970699, now seen corresponding path program 1 times [2022-03-18 22:44:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123407957] [2022-03-18 22:44:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:34,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:34,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:34,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36672877] [2022-03-18 22:44:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:34,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:34,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:44:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 22:44:34,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:44:34,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 22:44:34,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123407957] [2022-03-18 22:44:34,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36672877] [2022-03-18 22:44:34,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36672877] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 22:44:34,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 22:44:34,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 22:44:34,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55862412] [2022-03-18 22:44:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:34,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:44:34,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:44:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 22:44:34,742 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:44:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:34,782 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-03-18 22:44:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:44:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-03-18 22:44:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:34,784 INFO L225 Difference]: With dead ends: 63 [2022-03-18 22:44:34,785 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 22:44:34,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:44:34,786 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:34,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:44:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 22:44:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-03-18 22:44:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 22:44:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-03-18 22:44:34,801 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2022-03-18 22:44:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:34,801 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-03-18 22:44:34,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:44:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-03-18 22:44:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 22:44:34,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:34,804 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:34,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:35,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:35,020 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1500982750, now seen corresponding path program 1 times [2022-03-18 22:44:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599226074] [2022-03-18 22:44:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:35,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:35,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750876421] [2022-03-18 22:44:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:35,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:35,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:35,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:44:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 22:44:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 22:44:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 22:44:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599226074] [2022-03-18 22:44:36,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750876421] [2022-03-18 22:44:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750876421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:36,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:44:36,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 22:44:36,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609477632] [2022-03-18 22:44:36,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:36,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 22:44:36,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:36,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 22:44:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:44:36,029 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 22:44:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:40,430 INFO L93 Difference]: Finished difference Result 148 states and 204 transitions. [2022-03-18 22:44:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 22:44:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 58 [2022-03-18 22:44:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:40,432 INFO L225 Difference]: With dead ends: 148 [2022-03-18 22:44:40,432 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 22:44:40,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:44:40,433 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:40,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 283 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:44:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 22:44:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2022-03-18 22:44:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 67 states have internal predecessors, (78), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-18 22:44:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-03-18 22:44:40,445 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 58 [2022-03-18 22:44:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:40,446 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-03-18 22:44:40,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 22:44:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-03-18 22:44:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 22:44:40,447 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:40,447 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:40,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:40,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:40,663 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash -781577916, now seen corresponding path program 1 times [2022-03-18 22:44:40,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:40,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433127358] [2022-03-18 22:44:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:40,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:40,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328870041] [2022-03-18 22:44:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:40,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:40,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:40,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:40,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:44:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 22:44:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 22:44:41,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-18 22:44:41,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:41,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433127358] [2022-03-18 22:44:41,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:41,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328870041] [2022-03-18 22:44:41,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328870041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:41,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:44:41,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 22:44:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882589933] [2022-03-18 22:44:41,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:41,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 22:44:41,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 22:44:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 22:44:41,251 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 22:44:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:41,510 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2022-03-18 22:44:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 22:44:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 69 [2022-03-18 22:44:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:41,511 INFO L225 Difference]: With dead ends: 163 [2022-03-18 22:44:41,511 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 22:44:41,512 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-18 22:44:41,512 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:41,512 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 141 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:44:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 22:44:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2022-03-18 22:44:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 22:44:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-03-18 22:44:41,523 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 69 [2022-03-18 22:44:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:41,523 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-03-18 22:44:41,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 22:44:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-03-18 22:44:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 22:44:41,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:41,524 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:41,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 22:44:41,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:41,740 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1979995209, now seen corresponding path program 1 times [2022-03-18 22:44:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:41,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239507751] [2022-03-18 22:44:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:41,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:41,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819772775] [2022-03-18 22:44:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:41,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:41,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:44:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:44:41,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-18 22:44:41,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:44:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:41,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239507751] [2022-03-18 22:44:41,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:41,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819772775] [2022-03-18 22:44:41,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819772775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:41,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:41,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 22:44:41,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373658765] [2022-03-18 22:44:41,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:41,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:44:41,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:41,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:44:41,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:44:41,928 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 22:44:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:41,960 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-03-18 22:44:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:44:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-03-18 22:44:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:41,961 INFO L225 Difference]: With dead ends: 109 [2022-03-18 22:44:41,962 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 22:44:41,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:44:41,962 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:41,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 98 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:44:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 22:44:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-18 22:44:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 22:44:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2022-03-18 22:44:41,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 78 [2022-03-18 22:44:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:41,971 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2022-03-18 22:44:41,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 22:44:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2022-03-18 22:44:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 22:44:41,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:41,972 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:41,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:42,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:42,187 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1650636816, now seen corresponding path program 2 times [2022-03-18 22:44:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:42,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000349501] [2022-03-18 22:44:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:42,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118130689] [2022-03-18 22:44:42,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:44:42,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:42,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:42,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:44:42,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:44:42,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:44:42,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:44:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 22:44:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 22:44:42,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 22:45:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000349501] [2022-03-18 22:45:05,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:45:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118130689] [2022-03-18 22:45:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118130689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:05,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:45:05,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 22:45:05,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143737478] [2022-03-18 22:45:05,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:05,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 22:45:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 22:45:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=178, Unknown=2, NotChecked=0, Total=240 [2022-03-18 22:45:05,177 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 22:45:17,592 WARN L232 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:45:25,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 22:45:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:25,718 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2022-03-18 22:45:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 22:45:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 88 [2022-03-18 22:45:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:25,721 INFO L225 Difference]: With dead ends: 222 [2022-03-18 22:45:25,721 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 22:45:25,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=114, Invalid=304, Unknown=2, NotChecked=0, Total=420 [2022-03-18 22:45:25,722 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 85 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 191 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:25,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 498 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-03-18 22:45:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 22:45:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2022-03-18 22:45:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.21875) internal successors, (117), 100 states have internal predecessors, (117), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-18 22:45:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2022-03-18 22:45:25,737 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 88 [2022-03-18 22:45:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:25,737 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2022-03-18 22:45:25,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 22:45:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2022-03-18 22:45:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 22:45:25,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:25,739 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:25,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:25,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:25,939 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1538097783, now seen corresponding path program 1 times [2022-03-18 22:45:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850600814] [2022-03-18 22:45:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:25,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:25,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:45:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613259847] [2022-03-18 22:45:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:25,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:25,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:45:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:45:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 22:45:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 22:45:26,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 22:45:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850600814] [2022-03-18 22:45:26,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:45:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613259847] [2022-03-18 22:45:26,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613259847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:26,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:45:26,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 22:45:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73100530] [2022-03-18 22:45:26,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:26,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 22:45:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 22:45:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:45:26,855 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-18 22:45:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:27,021 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-03-18 22:45:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:45:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 104 [2022-03-18 22:45:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:27,023 INFO L225 Difference]: With dead ends: 176 [2022-03-18 22:45:27,023 INFO L226 Difference]: Without dead ends: 168 [2022-03-18 22:45:27,023 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:45:27,023 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:27,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 348 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:45:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-18 22:45:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-03-18 22:45:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-18 22:45:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 223 transitions. [2022-03-18 22:45:27,049 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 223 transitions. Word has length 104 [2022-03-18 22:45:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:27,050 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 223 transitions. [2022-03-18 22:45:27,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-18 22:45:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 223 transitions. [2022-03-18 22:45:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 22:45:27,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:27,051 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:27,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:27,267 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,SelfDestructingSolverStorable9 [2022-03-18 22:45:27,267 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash -191386235, now seen corresponding path program 2 times [2022-03-18 22:45:27,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:27,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518009111] [2022-03-18 22:45:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:27,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:27,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:45:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898296858] [2022-03-18 22:45:27,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:45:27,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:27,276 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) [2022-03-18 22:45:27,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 22:45:27,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:45:27,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:45:27,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-18 22:45:27,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-18 22:45:27,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:27,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518009111] [2022-03-18 22:45:27,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:45:27,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898296858] [2022-03-18 22:45:27,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898296858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:27,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:45:27,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-18 22:45:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225986673] [2022-03-18 22:45:27,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:27,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 22:45:27,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 22:45:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:45:27,748 INFO L87 Difference]: Start difference. First operand 168 states and 223 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-18 22:45:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:27,810 INFO L93 Difference]: Finished difference Result 197 states and 260 transitions. [2022-03-18 22:45:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:45:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 117 [2022-03-18 22:45:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:27,811 INFO L225 Difference]: With dead ends: 197 [2022-03-18 22:45:27,811 INFO L226 Difference]: Without dead ends: 130 [2022-03-18 22:45:27,812 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:45:27,812 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:27,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:45:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-18 22:45:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-18 22:45:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 22:45:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-03-18 22:45:27,823 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 117 [2022-03-18 22:45:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:27,823 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-03-18 22:45:27,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-18 22:45:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-03-18 22:45:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 22:45:27,824 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:27,824 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:27,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 22:45:28,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:28,040 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 525706014, now seen corresponding path program 3 times [2022-03-18 22:45:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139533160] [2022-03-18 22:45:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:28,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:45:28,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009688666] [2022-03-18 22:45:28,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:45:28,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:28,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:28,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 22:45:28,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 22:45:28,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 22:45:28,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:28,358 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:45:28,389 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:45:28,419 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:45:28,467 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 22:45:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-18 22:45:28,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139533160] [2022-03-18 22:45:34,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:45:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009688666] [2022-03-18 22:45:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009688666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:45:34,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 22:45:34,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 22:45:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695632805] [2022-03-18 22:45:34,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:34,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 22:45:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 22:45:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-18 22:45:34,762 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 22:45:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:34,833 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2022-03-18 22:45:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:45:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2022-03-18 22:45:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:34,834 INFO L225 Difference]: With dead ends: 136 [2022-03-18 22:45:34,834 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 22:45:34,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-18 22:45:34,835 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:34,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:45:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 22:45:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-03-18 22:45:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 28 states have call successors, (28), 16 states have call predecessors, (28), 14 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 22:45:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2022-03-18 22:45:34,844 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 118 [2022-03-18 22:45:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:34,844 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2022-03-18 22:45:34,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 22:45:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2022-03-18 22:45:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 22:45:34,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:45:34,845 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:34,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:35,059 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,SelfDestructingSolverStorable11 [2022-03-18 22:45:35,059 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:45:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:45:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1635698089, now seen corresponding path program 3 times [2022-03-18 22:45:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:45:35,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479421881] [2022-03-18 22:45:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:45:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:45:35,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:45:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807652388] [2022-03-18 22:45:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:45:35,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:45:35,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:45:35,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:45:35,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 22:45:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 22:45:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:45:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:45:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:45:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-18 22:45:35,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:45:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-18 22:45:35,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:45:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479421881] [2022-03-18 22:45:35,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:45:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807652388] [2022-03-18 22:45:35,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807652388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:45:35,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:45:35,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 22:45:35,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388442965] [2022-03-18 22:45:35,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:45:35,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 22:45:35,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:45:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 22:45:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:45:35,449 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 22:45:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:45:35,532 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2022-03-18 22:45:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 22:45:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-03-18 22:45:35,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:45:35,532 INFO L225 Difference]: With dead ends: 120 [2022-03-18 22:45:35,532 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 22:45:35,533 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-18 22:45:35,533 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:45:35,533 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 85 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:45:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 22:45:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 22:45:35,534 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) [2022-03-18 22:45:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 22:45:35,534 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2022-03-18 22:45:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:45:35,534 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 22:45:35,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 22:45:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 22:45:35,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 22:45:35,536 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 22:45:35,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 22:45:35,743 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,SelfDestructingSolverStorable12 [2022-03-18 22:45:35,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 22:45:45,888 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|)) [2022-03-18 22:45:45,889 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 22:45:45,889 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 22:45:45,889 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 22:45:45,889 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 22:45:45,889 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 22:45:45,889 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 22:45:45,889 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 60) the Hoare annotation is: true [2022-03-18 22:45:45,889 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 41) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-18 22:45:45,889 INFO L882 garLoopResultBuilder]: For program point L51-2(lines 22 60) no Hoare annotation was computed. [2022-03-18 22:45:45,889 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-18 22:45:45,889 INFO L878 garLoopResultBuilder]: At program point L43-1(lines 43 55) the Hoare annotation is: (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) (= main_~B~0 main_~d~0)) [2022-03-18 22:45:45,889 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (* main_~B~0 main_~p~0) main_~d~0) (<= 1 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-18 22:45:45,889 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-18 22:45:45,889 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0))) (or (and (= main_~B~0 1) .cse0 (= main_~p~0 1)) (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) .cse0))) [2022-03-18 22:45:45,890 INFO L878 garLoopResultBuilder]: At program point L44-1(line 44) the Hoare annotation is: (let ((.cse1 (* main_~B~0 main_~q~0))) (let ((.cse0 (div main_~p~0 2)) (.cse2 (= (+ .cse1 main_~r~0) main_~A~0))) (or (and (<= 1 .cse0) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse1 main_~r~0)) (= main_~B~0 1) .cse2) (and (= (let ((.cse3 (div main_~d~0 2))) (+ (div .cse3 2) main_~A~0 .cse3)) (+ .cse1 main_~r~0 (* main_~B~0 (div .cse0 2)) (* main_~B~0 .cse0))) (<= 1 main_~B~0) .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1))))) [2022-03-18 22:45:45,890 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L58(line 58) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L45(lines 43 55) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L36(lines 33 41) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 60) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L51(lines 51 54) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 60) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-18 22:45:45,890 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-18 22:45:45,892 INFO L718 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:45:45,893 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 22:45:45,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:45:45 BasicIcfg [2022-03-18 22:45:45,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 22:45:45,904 INFO L158 Benchmark]: Toolchain (without parser) took 73585.16ms. Allocated memory was 181.4MB in the beginning and 299.9MB in the end (delta: 118.5MB). Free memory was 126.7MB in the beginning and 237.7MB in the end (delta: -111.0MB). Peak memory consumption was 155.4MB. Max. memory is 8.0GB. [2022-03-18 22:45:45,904 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 142.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 22:45:45,905 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.94ms. Allocated memory was 181.4MB in the beginning and 249.6MB in the end (delta: 68.2MB). Free memory was 126.5MB in the beginning and 221.7MB in the end (delta: -95.2MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. [2022-03-18 22:45:45,905 INFO L158 Benchmark]: Boogie Preprocessor took 17.43ms. Allocated memory is still 249.6MB. Free memory was 221.7MB in the beginning and 220.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 22:45:45,905 INFO L158 Benchmark]: RCFGBuilder took 240.63ms. Allocated memory is still 249.6MB. Free memory was 220.3MB in the beginning and 209.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 22:45:45,905 INFO L158 Benchmark]: IcfgTransformer took 14.07ms. Allocated memory is still 249.6MB. Free memory was 209.6MB in the beginning and 208.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 22:45:45,905 INFO L158 Benchmark]: TraceAbstraction took 73130.46ms. Allocated memory was 249.6MB in the beginning and 299.9MB in the end (delta: 50.3MB). Free memory was 207.8MB in the beginning and 237.7MB in the end (delta: -29.9MB). Peak memory consumption was 169.6MB. Max. memory is 8.0GB. [2022-03-18 22:45:45,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 142.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.94ms. Allocated memory was 181.4MB in the beginning and 249.6MB in the end (delta: 68.2MB). Free memory was 126.5MB in the beginning and 221.7MB in the end (delta: -95.2MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.43ms. Allocated memory is still 249.6MB. Free memory was 221.7MB in the beginning and 220.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.63ms. Allocated memory is still 249.6MB. Free memory was 220.3MB in the beginning and 209.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.07ms. Allocated memory is still 249.6MB. Free memory was 209.6MB in the beginning and 208.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 73130.46ms. Allocated memory was 249.6MB in the beginning and 299.9MB in the end (delta: 50.3MB). Free memory was 207.8MB in the beginning and 237.7MB in the end (delta: -29.9MB). Peak memory consumption was 169.6MB. 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: 17]: 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 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.1s, OverallIterations: 13, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 26.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 369 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 307 mSDsluCounter, 2072 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1611 mSDsCounter, 428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1768 IncrementalHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 428 mSolverCounterUnsat, 461 mSDtfsCounter, 1768 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1477 GetRequests, 1334 SyntacticMatches, 22 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 28.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=10, InterpolantAutomatonStates: 97, 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, 13 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 126 PreInvPairs, 186 NumberOfFragments, 453 HoareAnnotationTreeSize, 126 FomulaSimplifications, 538 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 13 FomulaSimplificationsInter, 13266 FormulaSimplificationTreeSizeReductionInter, 9.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 33.5s InterpolantComputationTime, 867 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1442 ConstructedInterpolants, 0 QuantifiedInterpolants, 15863 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1855 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 6338/6540 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: 33]: Loop Invariant Derived loop invariant: (((((q == 0 && B == 1) && B * q + r == A) && B == d) && p == 1) || ((((B * 2 == d && p == 2) && q == 0) && B == 1) && B * q + r == A)) || ((((1 <= p / 2 / 2 && A + d == B * p + B * q + r) && q == 0) && B == 1) && B * q + r == A) RESULT: Ultimate proved your program to be correct! [2022-03-18 22:45:45,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...