/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:20:33,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:20:34,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:20:34,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:20:34,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:20:34,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:20:34,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:20:34,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:20:34,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:20:34,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:20:34,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:20:34,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:20:34,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:20:34,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:20:34,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:20:34,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:20:34,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:20:34,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:20:34,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:20:34,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:20:34,078 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:20:34,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:20:34,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:20:34,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:20:34,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:20:34,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 10:20:34,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 10:20:34,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 10:20:34,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 10:20:34,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 10:20:34,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-20 10:20:34,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:20:34,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:20:34,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:20:34,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:20:34,122 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:20:34,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:20:34,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:20:34,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:20:34,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:20:34,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:20:34,125 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:20:34,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:20:34,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:20:34,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:20:34,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:20:34,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:20:34,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:20:34,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:20:34,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:20:34,128 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:20:34,128 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:20:34,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:20:34,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:20:34,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:20:34,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:20:34,356 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:20:34,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-03-20 10:20:34,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f06cf3e/40998427b7584480b0830f0e20250191/FLAGae37212e2 [2022-03-20 10:20:34,763 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:20:34,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-03-20 10:20:34,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f06cf3e/40998427b7584480b0830f0e20250191/FLAGae37212e2 [2022-03-20 10:20:34,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f06cf3e/40998427b7584480b0830f0e20250191 [2022-03-20 10:20:34,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:20:34,793 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:20:34,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:20:34,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:20:34,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:20:34,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:20:34" (1/1) ... [2022-03-20 10:20:34,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b7c559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:34, skipping insertion in model container [2022-03-20 10:20:34,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:20:34" (1/1) ... [2022-03-20 10:20:34,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:20:34,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:20:34,947 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2022-03-20 10:20:34,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:20:34,977 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:20:34,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2022-03-20 10:20:35,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:20:35,013 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:20:35,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35 WrapperNode [2022-03-20 10:20:35,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:20:35,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:20:35,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:20:35,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:20:35,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:20:35,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:20:35,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:20:35,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:20:35,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:20:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:35,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 10:20:35,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 10:20:35,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:20:35,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:20:35,100 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:20:35,100 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:20:35,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:20:35,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:20:35,101 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:20:35,101 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:20:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:20:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:20:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 10:20:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:20:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:20:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:20:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:20:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:20:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:20:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:20:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:20:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:20:35,147 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:20:35,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:20:35,315 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:20:35,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:20:35,330 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 10:20:35,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:20:35 BoogieIcfgContainer [2022-03-20 10:20:35,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:20:35,332 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:20:35,332 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:20:35,344 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:20:35,346 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:20:35" (1/1) ... [2022-03-20 10:20:35,347 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:20:35,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:20:35 BasicIcfg [2022-03-20 10:20:35,369 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:20:35,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:20:35,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:20:35,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:20:35,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:20:34" (1/4) ... [2022-03-20 10:20:35,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c2cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:20:35, skipping insertion in model container [2022-03-20 10:20:35,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:20:35" (2/4) ... [2022-03-20 10:20:35,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c2cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:20:35, skipping insertion in model container [2022-03-20 10:20:35,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:20:35" (3/4) ... [2022-03-20 10:20:35,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c2cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:20:35, skipping insertion in model container [2022-03-20 10:20:35,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:20:35" (4/4) ... [2022-03-20 10:20:35,374 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.cqvasr [2022-03-20 10:20:35,377 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:20:35,377 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:20:35,437 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:20:35,442 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 10:20:35,442 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:20:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 10:20:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 10:20:35,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:35,456 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:35,456 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:35,460 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-20 10:20:35,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:35,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041575244] [2022-03-20 10:20:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:20:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:20:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 10:20:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 10:20:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 10:20:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:20:35,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:35,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041575244] [2022-03-20 10:20:35,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041575244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:20:35,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:20:35,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:20:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105198025] [2022-03-20 10:20:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:35,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:20:35,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:20:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:20:35,652 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:20:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:35,725 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 10:20:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:20:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 10:20:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:35,732 INFO L225 Difference]: With dead ends: 73 [2022-03-20 10:20:35,732 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 10:20:35,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:20:35,742 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:35,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:20:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 10:20:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 10:20:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:20:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 10:20:35,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 10:20:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:35,776 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 10:20:35,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:20:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 10:20:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 10:20:35,780 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:35,780 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:35,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:20:35,780 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-20 10:20:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580717422] [2022-03-20 10:20:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:35,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:35,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716576647] [2022-03-20 10:20:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:35,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:35,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:35,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:35,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:20:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:20:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:20:36,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:20:36,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580717422] [2022-03-20 10:20:36,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716576647] [2022-03-20 10:20:36,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716576647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:20:36,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:20:36,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:20:36,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398005779] [2022-03-20 10:20:36,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:36,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:20:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:20:36,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:20:36,046 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:20:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:36,118 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 10:20:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:20:36,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 10:20:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:36,120 INFO L225 Difference]: With dead ends: 54 [2022-03-20 10:20:36,120 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 10:20:36,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:20:36,121 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:36,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:20:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 10:20:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-20 10:20:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:20:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 10:20:36,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-20 10:20:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:36,142 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 10:20:36,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:20:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 10:20:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 10:20:36,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:36,144 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:36,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 10:20:36,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:36,365 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-20 10:20:36,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:36,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812239101] [2022-03-20 10:20:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:36,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:36,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628945333] [2022-03-20 10:20:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:36,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:36,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:36,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:36,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:20:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 10:20:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:20:36,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:20:36,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812239101] [2022-03-20 10:20:36,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628945333] [2022-03-20 10:20:36,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628945333] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:20:36,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:20:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-20 10:20:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253441616] [2022-03-20 10:20:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:36,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 10:20:36,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 10:20:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:20:36,930 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:20:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:36,981 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-20 10:20:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:20:36,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-20 10:20:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:36,983 INFO L225 Difference]: With dead ends: 53 [2022-03-20 10:20:36,983 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 10:20:36,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 10:20:36,984 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:36,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:20:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 10:20:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 10:20:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:20:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 10:20:36,991 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-20 10:20:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:36,991 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 10:20:36,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:20:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 10:20:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 10:20:36,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:36,992 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:37,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 10:20:37,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 10:20:37,221 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-20 10:20:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748033056] [2022-03-20 10:20:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:37,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:37,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426013185] [2022-03-20 10:20:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:37,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:37,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:37,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:37,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:20:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:37,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:20:37,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:20:37,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:20:37,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:37,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748033056] [2022-03-20 10:20:37,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:37,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426013185] [2022-03-20 10:20:37,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426013185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:37,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:37,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 10:20:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622199671] [2022-03-20 10:20:37,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:37,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:20:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:20:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:20:37,507 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:20:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:37,630 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 10:20:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:20:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 10:20:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:37,631 INFO L225 Difference]: With dead ends: 103 [2022-03-20 10:20:37,631 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 10:20:37,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:20:37,632 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:37,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 341 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:20:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 10:20:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 10:20:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 10:20:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 10:20:37,642 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 10:20:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:37,642 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 10:20:37,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:20:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 10:20:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:20:37,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:37,643 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:37,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:37,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:37,858 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-20 10:20:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:37,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566160668] [2022-03-20 10:20:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:37,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:37,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23153815] [2022-03-20 10:20:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:37,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:37,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:37,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:20:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 10:20:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 10:20:38,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:38,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566160668] [2022-03-20 10:20:38,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23153815] [2022-03-20 10:20:38,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23153815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:20:38,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:20:38,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 10:20:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229285419] [2022-03-20 10:20:38,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:38,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:20:38,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:38,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:20:38,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:20:38,144 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:20:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:38,223 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-20 10:20:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:20:38,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 10:20:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:38,224 INFO L225 Difference]: With dead ends: 79 [2022-03-20 10:20:38,224 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 10:20:38,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:20:38,225 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:38,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 201 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:20:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 10:20:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 10:20:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 10:20:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-20 10:20:38,234 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-20 10:20:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:38,235 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-20 10:20:38,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:20:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-20 10:20:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:20:38,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:38,236 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:38,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:38,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:38,450 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-20 10:20:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948513493] [2022-03-20 10:20:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:38,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:38,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731963140] [2022-03-20 10:20:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:38,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:38,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:38,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:20:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:38,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 10:20:38,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:20:38,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:20:38,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:38,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948513493] [2022-03-20 10:20:38,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:38,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731963140] [2022-03-20 10:20:38,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731963140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:38,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:38,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-20 10:20:38,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795521187] [2022-03-20 10:20:38,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:38,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 10:20:38,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:38,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 10:20:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-20 10:20:38,949 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 10:20:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:39,444 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-20 10:20:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 10:20:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-20 10:20:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:39,445 INFO L225 Difference]: With dead ends: 118 [2022-03-20 10:20:39,445 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 10:20:39,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-20 10:20:39,447 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:39,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 347 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 10:20:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 10:20:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-20 10:20:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 10:20:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-20 10:20:39,478 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-20 10:20:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:39,478 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-20 10:20:39,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 10:20:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-20 10:20:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 10:20:39,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:39,489 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:39,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:39,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:39,692 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-20 10:20:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:39,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035166250] [2022-03-20 10:20:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:39,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:39,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388933950] [2022-03-20 10:20:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:39,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:39,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:20:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:39,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:20:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:20:39,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:20:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035166250] [2022-03-20 10:20:39,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388933950] [2022-03-20 10:20:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388933950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:20:39,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:20:39,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:20:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027561958] [2022-03-20 10:20:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:39,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:20:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:20:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:20:39,848 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 10:20:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:39,905 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-20 10:20:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:20:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-20 10:20:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:39,923 INFO L225 Difference]: With dead ends: 151 [2022-03-20 10:20:39,923 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 10:20:39,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:20:39,924 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:39,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:20:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 10:20:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-20 10:20:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 10:20:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-20 10:20:39,959 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-20 10:20:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:39,959 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-20 10:20:39,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 10:20:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-20 10:20:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 10:20:39,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:39,960 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:39,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:40,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:40,161 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-03-20 10:20:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:40,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242163448] [2022-03-20 10:20:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:40,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:40,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429769626] [2022-03-20 10:20:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:40,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:40,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:40,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:20:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 10:20:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:20:40,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:20:40,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:40,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242163448] [2022-03-20 10:20:40,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:40,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429769626] [2022-03-20 10:20:40,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429769626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:40,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:40,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2022-03-20 10:20:40,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456722143] [2022-03-20 10:20:40,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:40,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 10:20:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 10:20:40,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 10:20:40,728 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:20:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:43,018 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-03-20 10:20:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 10:20:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-03-20 10:20:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:43,021 INFO L225 Difference]: With dead ends: 190 [2022-03-20 10:20:43,021 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 10:20:43,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 10:20:43,022 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:43,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 358 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 10:20:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 10:20:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-03-20 10:20:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 10:20:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-03-20 10:20:43,065 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-03-20 10:20:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:43,066 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-03-20 10:20:43,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:20:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-03-20 10:20:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 10:20:43,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:43,070 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:43,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:43,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:43,284 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-03-20 10:20:43,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:43,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652429793] [2022-03-20 10:20:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:43,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:43,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:43,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786216418] [2022-03-20 10:20:43,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:20:43,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:43,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:43,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:20:43,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:20:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:20:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:20:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:20:43,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:20:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652429793] [2022-03-20 10:20:43,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786216418] [2022-03-20 10:20:43,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786216418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:20:43,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:20:43,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:20:43,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574510928] [2022-03-20 10:20:43,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:43,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:20:43,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:20:43,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:20:43,433 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:20:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:43,497 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-03-20 10:20:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:20:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-20 10:20:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:43,499 INFO L225 Difference]: With dead ends: 225 [2022-03-20 10:20:43,499 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 10:20:43,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 10:20:43,503 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:43,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:20:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 10:20:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-20 10:20:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 10:20:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-03-20 10:20:43,527 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-03-20 10:20:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:43,528 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-03-20 10:20:43,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:20:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-03-20 10:20:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 10:20:43,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:43,530 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:43,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:43,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 10:20:43,748 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-20 10:20:43,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:43,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134197352] [2022-03-20 10:20:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:43,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:43,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465753868] [2022-03-20 10:20:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:43,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:43,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:43,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:20:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:43,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:20:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 10:20:43,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:20:43,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134197352] [2022-03-20 10:20:43,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465753868] [2022-03-20 10:20:43,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465753868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:20:43,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:20:43,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:20:43,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151616858] [2022-03-20 10:20:43,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:43,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:20:43,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:20:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:20:43,880 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 10:20:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:43,925 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-03-20 10:20:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:20:43,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 10:20:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:43,927 INFO L225 Difference]: With dead ends: 167 [2022-03-20 10:20:43,927 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 10:20:43,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:20:43,928 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:43,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:20:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 10:20:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-20 10:20:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 10:20:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-20 10:20:43,951 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-20 10:20:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:43,952 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-20 10:20:43,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 10:20:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-20 10:20:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 10:20:43,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:43,953 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:43,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:44,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 10:20:44,168 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:44,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-20 10:20:44,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:44,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848753579] [2022-03-20 10:20:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:44,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:44,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575910027] [2022-03-20 10:20:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:44,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:44,183 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:44,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 10:20:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 10:20:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 10:20:44,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 10:20:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:44,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848753579] [2022-03-20 10:20:44,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:44,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575910027] [2022-03-20 10:20:44,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575910027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:44,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:44,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 10:20:44,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993754883] [2022-03-20 10:20:44,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:44,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 10:20:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 10:20:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 10:20:44,937 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 10:20:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:47,493 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-03-20 10:20:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 10:20:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-03-20 10:20:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:47,499 INFO L225 Difference]: With dead ends: 331 [2022-03-20 10:20:47,499 INFO L226 Difference]: Without dead ends: 326 [2022-03-20 10:20:47,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 10:20:47,500 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 143 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:47,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 586 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 10:20:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-20 10:20:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-03-20 10:20:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 10:20:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-03-20 10:20:47,579 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-03-20 10:20:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:47,580 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-03-20 10:20:47,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 10:20:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-03-20 10:20:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 10:20:47,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:47,582 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:47,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:47,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 10:20:47,799 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-03-20 10:20:47,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:47,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558487522] [2022-03-20 10:20:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:47,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:47,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392549854] [2022-03-20 10:20:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:47,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:47,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:47,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:47,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 10:20:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:47,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 10:20:47,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 10:20:48,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 10:20:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558487522] [2022-03-20 10:20:48,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392549854] [2022-03-20 10:20:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392549854] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:20:48,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:20:48,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-03-20 10:20:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799317900] [2022-03-20 10:20:48,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:20:48,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:20:48,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:20:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:20:48,289 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-20 10:20:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:48,356 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-03-20 10:20:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:20:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-03-20 10:20:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:48,363 INFO L225 Difference]: With dead ends: 256 [2022-03-20 10:20:48,363 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 10:20:48,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-20 10:20:48,364 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:48,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:20:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 10:20:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-20 10:20:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 10:20:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-03-20 10:20:48,432 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-03-20 10:20:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:48,432 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-03-20 10:20:48,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-20 10:20:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-03-20 10:20:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 10:20:48,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:48,433 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:48,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 10:20:48,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 10:20:48,647 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-03-20 10:20:48,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518980505] [2022-03-20 10:20:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:48,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:48,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:48,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916506736] [2022-03-20 10:20:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:48,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:48,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:48,659 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:48,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 10:20:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 10:20:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 10:20:48,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 10:20:49,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518980505] [2022-03-20 10:20:49,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916506736] [2022-03-20 10:20:49,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916506736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:49,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:49,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 10:20:49,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020384857] [2022-03-20 10:20:49,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:49,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 10:20:49,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 10:20:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-20 10:20:49,049 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 10:20:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:49,309 INFO L93 Difference]: Finished difference Result 363 states and 502 transitions. [2022-03-20 10:20:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 10:20:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 72 [2022-03-20 10:20:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:49,311 INFO L225 Difference]: With dead ends: 363 [2022-03-20 10:20:49,311 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 10:20:49,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:20:49,312 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 77 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:49,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 355 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:20:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 10:20:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2022-03-20 10:20:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 128 states have (on average 1.171875) internal successors, (150), 134 states have internal predecessors, (150), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 10:20:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 318 transitions. [2022-03-20 10:20:49,358 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 318 transitions. Word has length 72 [2022-03-20 10:20:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:49,359 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 318 transitions. [2022-03-20 10:20:49,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 10:20:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 318 transitions. [2022-03-20 10:20:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 10:20:49,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:49,361 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:49,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:49,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 10:20:49,577 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-03-20 10:20:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860069413] [2022-03-20 10:20:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:49,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111680568] [2022-03-20 10:20:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:49,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:49,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 10:20:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:49,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 10:20:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 10:20:50,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 10:20:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860069413] [2022-03-20 10:20:51,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111680568] [2022-03-20 10:20:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111680568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:51,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:51,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-03-20 10:20:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182702491] [2022-03-20 10:20:51,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:51,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 10:20:51,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:51,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 10:20:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-20 10:20:51,609 INFO L87 Difference]: Start difference. First operand 229 states and 318 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 10:21:07,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:10,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:18,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:20,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:21,342 INFO L93 Difference]: Finished difference Result 428 states and 624 transitions. [2022-03-20 10:21:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 10:21:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-03-20 10:21:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:21,344 INFO L225 Difference]: With dead ends: 428 [2022-03-20 10:21:21,344 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 10:21:21,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1214, Invalid=4792, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 10:21:21,346 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 216 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 590 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:21,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 790 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1642 Invalid, 2 Unknown, 0 Unchecked, 20.7s Time] [2022-03-20 10:21:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 10:21:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 351. [2022-03-20 10:21:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 191 states have (on average 1.1727748691099475) internal successors, (224), 200 states have internal predecessors, (224), 139 states have call successors, (139), 21 states have call predecessors, (139), 20 states have return successors, (137), 129 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 10:21:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 500 transitions. [2022-03-20 10:21:21,462 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 500 transitions. Word has length 91 [2022-03-20 10:21:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:21,462 INFO L478 AbstractCegarLoop]: Abstraction has 351 states and 500 transitions. [2022-03-20 10:21:21,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 10:21:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 500 transitions. [2022-03-20 10:21:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 10:21:21,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:21,464 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:21,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:21,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 10:21:21,681 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-03-20 10:21:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233464036] [2022-03-20 10:21:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:21,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:21,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825663395] [2022-03-20 10:21:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:21,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:21,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:21,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:21,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 10:21:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:21:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 10:21:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 10:21:21,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 10:21:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:22,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233464036] [2022-03-20 10:21:22,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:22,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825663395] [2022-03-20 10:21:22,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825663395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:21:22,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:21:22,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-20 10:21:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896453222] [2022-03-20 10:21:22,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:22,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 10:21:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 10:21:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-20 10:21:22,198 INFO L87 Difference]: Start difference. First operand 351 states and 500 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-20 10:21:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:22,671 INFO L93 Difference]: Finished difference Result 570 states and 802 transitions. [2022-03-20 10:21:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 10:21:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-03-20 10:21:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:22,673 INFO L225 Difference]: With dead ends: 570 [2022-03-20 10:21:22,673 INFO L226 Difference]: Without dead ends: 350 [2022-03-20 10:21:22,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-03-20 10:21:22,674 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:22,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 459 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:21:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-20 10:21:22,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 341. [2022-03-20 10:21:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 197 states have (on average 1.1776649746192893) internal successors, (232), 198 states have internal predecessors, (232), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 10:21:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 476 transitions. [2022-03-20 10:21:22,797 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 476 transitions. Word has length 94 [2022-03-20 10:21:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:22,798 INFO L478 AbstractCegarLoop]: Abstraction has 341 states and 476 transitions. [2022-03-20 10:21:22,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-20 10:21:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 476 transitions. [2022-03-20 10:21:22,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 10:21:22,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:22,799 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:22,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:23,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:23,012 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:23,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-03-20 10:21:23,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:23,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724276057] [2022-03-20 10:21:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:23,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:23,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:23,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041316738] [2022-03-20 10:21:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:23,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:23,045 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:23,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 10:21:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:21:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 10:21:23,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 58 proven. 19 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-03-20 10:21:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-03-20 10:21:23,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:23,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724276057] [2022-03-20 10:21:23,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:23,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041316738] [2022-03-20 10:21:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041316738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:21:23,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:21:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 10:21:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64425853] [2022-03-20 10:21:23,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:23,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 10:21:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 10:21:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:21:23,797 INFO L87 Difference]: Start difference. First operand 341 states and 476 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-20 10:21:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:24,499 INFO L93 Difference]: Finished difference Result 474 states and 665 transitions. [2022-03-20 10:21:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 10:21:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 94 [2022-03-20 10:21:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:24,500 INFO L225 Difference]: With dead ends: 474 [2022-03-20 10:21:24,500 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 10:21:24,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 10:21:24,501 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 74 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:24,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 400 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 256 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-03-20 10:21:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 10:21:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-03-20 10:21:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 171 states have internal predecessors, (198), 115 states have call successors, (115), 18 states have call predecessors, (115), 17 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-20 10:21:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 426 transitions. [2022-03-20 10:21:24,614 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 426 transitions. Word has length 94 [2022-03-20 10:21:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:24,614 INFO L478 AbstractCegarLoop]: Abstraction has 303 states and 426 transitions. [2022-03-20 10:21:24,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-20 10:21:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 426 transitions. [2022-03-20 10:21:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 10:21:24,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:24,615 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:24,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 10:21:24,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 10:21:24,834 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2002100640, now seen corresponding path program 2 times [2022-03-20 10:21:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:24,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998883898] [2022-03-20 10:21:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:24,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021501346] [2022-03-20 10:21:24,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:21:24,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:24,841 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:24,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 10:21:24,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:21:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 10:21:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-03-20 10:21:25,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:27,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998883898] [2022-03-20 10:21:27,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021501346] [2022-03-20 10:21:27,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021501346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:21:27,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:21:27,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 10:21:27,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471440187] [2022-03-20 10:21:27,218 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:27,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 10:21:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 10:21:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-20 10:21:27,220 INFO L87 Difference]: Start difference. First operand 303 states and 426 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 10:21:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:27,744 INFO L93 Difference]: Finished difference Result 464 states and 667 transitions. [2022-03-20 10:21:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 10:21:27,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-03-20 10:21:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:27,747 INFO L225 Difference]: With dead ends: 464 [2022-03-20 10:21:27,748 INFO L226 Difference]: Without dead ends: 383 [2022-03-20 10:21:27,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-03-20 10:21:27,748 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 54 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:27,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 455 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:21:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-20 10:21:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 327. [2022-03-20 10:21:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 186 states have (on average 1.1612903225806452) internal successors, (216), 187 states have internal predecessors, (216), 123 states have call successors, (123), 18 states have call predecessors, (123), 17 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 10:21:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 460 transitions. [2022-03-20 10:21:27,878 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 460 transitions. Word has length 116 [2022-03-20 10:21:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:27,878 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 460 transitions. [2022-03-20 10:21:27,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 10:21:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 460 transitions. [2022-03-20 10:21:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 10:21:27,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:27,880 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:27,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:28,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 10:21:28,096 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1586140833, now seen corresponding path program 3 times [2022-03-20 10:21:28,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967230070] [2022-03-20 10:21:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:28,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:28,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530041642] [2022-03-20 10:21:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:21:28,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:28,113 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:28,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 10:21:28,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 10:21:28,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 10:21:28,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 10:21:29,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:30,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967230070] [2022-03-20 10:21:30,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530041642] [2022-03-20 10:21:30,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530041642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:21:30,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:21:30,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 10:21:30,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040542217] [2022-03-20 10:21:30,373 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:30,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 10:21:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 10:21:30,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-20 10:21:30,374 INFO L87 Difference]: Start difference. First operand 327 states and 460 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 10:21:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:31,940 INFO L93 Difference]: Finished difference Result 412 states and 577 transitions. [2022-03-20 10:21:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 10:21:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-03-20 10:21:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:31,942 INFO L225 Difference]: With dead ends: 412 [2022-03-20 10:21:31,943 INFO L226 Difference]: Without dead ends: 410 [2022-03-20 10:21:31,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 10:21:31,943 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:31,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 448 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 10:21:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-20 10:21:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 339. [2022-03-20 10:21:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 195 states have (on average 1.1538461538461537) internal successors, (225), 196 states have internal predecessors, (225), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 10:21:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 469 transitions. [2022-03-20 10:21:32,069 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 469 transitions. Word has length 121 [2022-03-20 10:21:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:32,070 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 469 transitions. [2022-03-20 10:21:32,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 10:21:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 469 transitions. [2022-03-20 10:21:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 10:21:32,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:32,071 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:32,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:32,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 10:21:32,284 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1478543105, now seen corresponding path program 4 times [2022-03-20 10:21:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033023360] [2022-03-20 10:21:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:32,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:32,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681700898] [2022-03-20 10:21:32,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:21:32,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:32,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:32,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 10:21:32,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:21:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:21:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 183 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 10:21:32,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-20 10:21:32,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033023360] [2022-03-20 10:21:32,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681700898] [2022-03-20 10:21:32,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681700898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:21:32,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:21:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 10:21:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322213418] [2022-03-20 10:21:32,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:32,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 10:21:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 10:21:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:21:32,897 INFO L87 Difference]: Start difference. First operand 339 states and 469 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-03-20 10:21:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:33,215 INFO L93 Difference]: Finished difference Result 433 states and 581 transitions. [2022-03-20 10:21:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 10:21:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 119 [2022-03-20 10:21:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:33,217 INFO L225 Difference]: With dead ends: 433 [2022-03-20 10:21:33,217 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 10:21:33,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-03-20 10:21:33,218 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 45 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:33,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 477 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:21:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 10:21:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2022-03-20 10:21:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 137 states have internal predecessors, (142), 71 states have call successors, (71), 19 states have call predecessors, (71), 18 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 10:21:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2022-03-20 10:21:33,288 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 119 [2022-03-20 10:21:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:33,289 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2022-03-20 10:21:33,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-03-20 10:21:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2022-03-20 10:21:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 10:21:33,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:33,290 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:33,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:33,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:33,506 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2145578717, now seen corresponding path program 5 times [2022-03-20 10:21:33,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:33,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714076071] [2022-03-20 10:21:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:33,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622215774] [2022-03-20 10:21:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 10:21:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:33,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:33,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:33,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 10:21:33,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 10:21:33,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:33,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 10:21:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 63 proven. 68 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 10:21:34,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 58 proven. 73 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 10:21:34,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:34,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714076071] [2022-03-20 10:21:34,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:34,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622215774] [2022-03-20 10:21:34,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622215774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:21:34,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:21:34,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2022-03-20 10:21:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950348159] [2022-03-20 10:21:34,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:34,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 10:21:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 10:21:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-03-20 10:21:34,740 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2022-03-20 10:21:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:35,555 INFO L93 Difference]: Finished difference Result 258 states and 308 transitions. [2022-03-20 10:21:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 10:21:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) Word has length 146 [2022-03-20 10:21:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:35,571 INFO L225 Difference]: With dead ends: 258 [2022-03-20 10:21:35,571 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 10:21:35,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 10:21:35,572 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 85 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:35,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 608 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 10:21:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 10:21:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-20 10:21:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 28 states have call successors, (28), 10 states have call predecessors, (28), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 10:21:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-03-20 10:21:35,591 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 146 [2022-03-20 10:21:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:35,591 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-03-20 10:21:35,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2022-03-20 10:21:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-03-20 10:21:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 10:21:35,592 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:35,592 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:35,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 10:21:35,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:35,798 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash -586103770, now seen corresponding path program 6 times [2022-03-20 10:21:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:35,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833143235] [2022-03-20 10:21:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:35,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444412133] [2022-03-20 10:21:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 10:21:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:35,805 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:35,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 10:21:35,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 10:21:35,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 10:21:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2022-03-20 10:21:36,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 79 proven. 37 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-03-20 10:21:36,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833143235] [2022-03-20 10:21:36,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444412133] [2022-03-20 10:21:36,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444412133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:21:36,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:21:36,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 10:21:36,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098022035] [2022-03-20 10:21:36,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:36,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 10:21:36,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 10:21:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-20 10:21:36,589 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-03-20 10:21:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:36,900 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-03-20 10:21:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 10:21:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 160 [2022-03-20 10:21:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:36,900 INFO L225 Difference]: With dead ends: 89 [2022-03-20 10:21:36,900 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 10:21:36,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-03-20 10:21:36,902 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:36,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 341 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:21:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 10:21:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 10:21:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 10:21:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 10:21:36,903 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2022-03-20 10:21:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:36,903 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 10:21:36,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-03-20 10:21:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 10:21:36,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 10:21:36,905 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 10:21:36,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 10:21:37,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 10:21:37,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 10:22:02,715 WARN L232 SmtUtils]: Spent 22.76s on a formula simplification. DAG size of input: 153 DAG size of output: 68 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 10:22:11,533 WARN L232 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 232 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 10:22:19,455 WARN L232 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 230 DAG size of output: 86 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 10:22:27,261 WARN L232 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 230 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 10:22:36,426 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 10:22:36,427 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-03-20 10:22:36,427 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-20 10:22:36,427 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-20 10:22:36,427 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 2) (<= main_~x~0 2)) [2022-03-20 10:22:36,427 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-03-20 10:22:36,427 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse8 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse1 (<= 1 main_~x~0)) (.cse3 (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) .cse8)) (.cse0 (div (+ 2 (* (- 1) main_~b~0)) 2)) (.cse2 (<= main_~y~0 2)) (.cse4 (= main_~a~0 .cse8)) (.cse7 (<= 1 main_~a~0)) (.cse5 (<= 1 main_~y~0)) (.cse6 (<= main_~x~0 2))) (or (and (< main_~b~0 main_~a~0) (< main_~b~0 .cse0) .cse1 .cse2 (< main_~c~0 (div (+ (* (- 1) main_~c~0) 2) 2)) .cse3 .cse4 (<= 0 main_~c~0) (<= 0 main_~b~0) .cse5 .cse6) (and (= main_~s~0 0) (= main_~p~0 0) (= main_~k~0 0) (= main_~r~0 1) (= main_~a~0 main_~y~0) (= main_~b~0 main_~x~0) (<= main_~c~0 2) (<= main_~b~0 main_~c~0) (< main_~x~0 main_~a~0) (<= main_~a~0 2) (<= 1 main_~b~0) (= main_~q~0 1)) (and .cse1 .cse2 .cse3 .cse7 (<= main_~a~0 .cse0) (<= main_~c~0 (+ (div (+ main_~b~0 (- 4)) 2) 2)) (= main_~c~0 0) .cse5 .cse6) (and .cse2 (= main_~s~0 1) .cse4 .cse7 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse5 (= main_~a~0 main_~x~0) .cse6 (= main_~p~0 1))))) [2022-03-20 10:22:36,428 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (<= main_~y~0 2) (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) .cse0) (<= main_~b~0 main_~c~0) (or (= main_~b~0 0) (= main_~a~0 .cse0)) (<= 1 main_~y~0))) [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse8 (* main_~y~0 main_~r~0)) (.cse9 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse5 (<= main_~a~0 2)) (.cse4 (<= main_~y~0 2)) (.cse16 (= main_~k~0 0)) (.cse10 (= main_~s~0 1)) (.cse11 (= main_~a~0 (+ .cse8 .cse9))) (.cse12 (= main_~b~0 main_~y~0)) (.cse13 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse14 (= main_~a~0 main_~x~0)) (.cse7 (<= main_~x~0 2)) (.cse15 (= main_~p~0 1))) (or (let ((.cse1 (+ .cse8 main_~b~0 .cse9)) (.cse2 (* main_~q~0 main_~x~0)) (.cse3 (* main_~y~0 main_~s~0))) (and (< main_~b~0 main_~a~0) .cse0 (= .cse1 (+ (* .cse2 3) (* 3 .cse3))) (= .cse1 (+ .cse2 (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0) .cse3)) (= main_~b~0 (+ .cse2 .cse3)) (<= 1 main_~x~0) .cse4 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0) (< (div (+ (- 1) (* (- 1) main_~c~0)) (- 2)) (+ main_~b~0 1)) .cse5 (= main_~c~0 0) .cse6 .cse7)) (and .cse0 (= main_~x~0 (+ main_~c~0 main_~b~0)) .cse10 .cse11 (<= 0 main_~c~0) .cse12 (= main_~k~0 1) (not (<= main_~b~0 main_~c~0)) .cse13 .cse14 .cse7 .cse15) (and (= main_~s~0 0) (= main_~p~0 0) .cse16 (= main_~r~0 1) (= main_~a~0 main_~y~0) (< main_~b~0 main_~c~0) (= main_~b~0 main_~x~0) (<= main_~c~0 2) (< main_~x~0 main_~a~0) .cse5 (<= 1 main_~b~0) (= main_~q~0 1)) (and .cse4 .cse16 .cse10 .cse11 (<= 1 main_~a~0) .cse12 .cse13 .cse6 .cse14 (= main_~c~0 main_~x~0) .cse7 .cse15)))) [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse11 (div main_~c~0 2)) (.cse7 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse9 (<= main_~a~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~q~0 0)) (.cse16 (<= main_~x~0 main_~a~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse18 (= main_~c~0 main_~x~0)) (.cse19 (= main_~p~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (< main_~b~0 main_~c~0)) (.cse20 (= main_~d~0 1)) (.cse10 (<= 1 main_~y~0)) (.cse12 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (<= main_~b~0 (div .cse11 2)) .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 (<= main_~b~0 .cse11) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 .cse6 .cse14 (<= main_~b~0 main_~c~0) .cse20 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= main_~r~0 1) (= main_~a~0 main_~y~0) .cse8 .cse20 (<= 0 main_~b~0) (= main_~q~0 1) .cse10 .cse12))) [2022-03-20 10:22:36,428 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-03-20 10:22:36,428 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse11 (div main_~c~0 2)) (.cse7 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse9 (<= main_~a~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~q~0 0)) (.cse16 (<= main_~x~0 main_~a~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse18 (= main_~c~0 main_~x~0)) (.cse19 (= main_~p~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (< main_~b~0 main_~c~0)) (.cse20 (= main_~d~0 1)) (.cse10 (<= 1 main_~y~0)) (.cse12 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (<= main_~b~0 (div .cse11 2)) .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 (<= main_~b~0 .cse11) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 .cse6 .cse14 (<= main_~b~0 main_~c~0) .cse20 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= main_~r~0 1) (= main_~a~0 main_~y~0) .cse8 .cse20 (<= 0 main_~b~0) (= main_~q~0 1) .cse10 .cse12))) [2022-03-20 10:22:36,428 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse11 (div main_~c~0 2)) (.cse7 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse9 (<= main_~a~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~q~0 0)) (.cse16 (<= main_~x~0 main_~a~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse18 (= main_~c~0 main_~x~0)) (.cse19 (= main_~p~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (< main_~b~0 main_~c~0)) (.cse20 (= main_~d~0 1)) (.cse10 (<= 1 main_~y~0)) (.cse12 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (<= main_~b~0 (div .cse11 2)) .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 (<= main_~b~0 .cse11) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 .cse6 .cse14 (<= main_~b~0 main_~c~0) .cse20 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= main_~r~0 1) (= main_~a~0 main_~y~0) .cse8 .cse20 (<= 0 main_~b~0) (= main_~q~0 1) .cse10 .cse12))) [2022-03-20 10:22:36,428 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse13 (div main_~c~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse12 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse7 (< main_~b~0 main_~c~0)) (.cse9 (<= main_~a~0 2)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse14 (= main_~s~0 1)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse15 (= main_~b~0 main_~y~0)) (.cse8 (= main_~d~0 1)) (.cse16 (= main_~q~0 0)) (.cse17 (<= main_~x~0 main_~a~0)) (.cse10 (<= 1 main_~y~0)) (.cse18 (= main_~a~0 main_~x~0)) (.cse19 (= main_~c~0 main_~x~0)) (.cse11 (<= main_~x~0 2)) (.cse20 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 .cse10 (<= main_~b~0 (div .cse13 2)) .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 (<= main_~b~0 .cse13) .cse6 .cse12 .cse15 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 .cse6 .cse15 (<= main_~b~0 main_~c~0) .cse8 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20))) [2022-03-20 10:22:36,429 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse13 (div main_~c~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse12 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse7 (< main_~b~0 main_~c~0)) (.cse9 (<= main_~a~0 2)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse14 (= main_~s~0 1)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse15 (= main_~b~0 main_~y~0)) (.cse8 (= main_~d~0 1)) (.cse16 (= main_~q~0 0)) (.cse17 (<= main_~x~0 main_~a~0)) (.cse10 (<= 1 main_~y~0)) (.cse18 (= main_~a~0 main_~x~0)) (.cse19 (= main_~c~0 main_~x~0)) (.cse11 (<= main_~x~0 2)) (.cse20 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 .cse10 (<= main_~b~0 (div .cse13 2)) .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 (<= main_~b~0 .cse13) .cse6 .cse12 .cse15 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 .cse6 .cse15 (<= main_~b~0 main_~c~0) .cse8 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20))) [2022-03-20 10:22:36,429 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-03-20 10:22:36,429 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-20 10:22:36,429 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-03-20 10:22:36,429 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-03-20 10:22:36,429 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-03-20 10:22:36,429 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-03-20 10:22:36,429 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-03-20 10:22:36,431 INFO L719 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:22:36,432 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 10:22:36,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:22:36 BasicIcfg [2022-03-20 10:22:36,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 10:22:36,449 INFO L158 Benchmark]: Toolchain (without parser) took 121655.73ms. Allocated memory was 250.6MB in the beginning and 361.8MB in the end (delta: 111.1MB). Free memory was 225.9MB in the beginning and 231.9MB in the end (delta: -6.0MB). Peak memory consumption was 219.2MB. Max. memory is 8.0GB. [2022-03-20 10:22:36,449 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 250.6MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 10:22:36,449 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.56ms. Allocated memory is still 250.6MB. Free memory was 225.7MB in the beginning and 223.4MB in the end (delta: 2.4MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. [2022-03-20 10:22:36,450 INFO L158 Benchmark]: Boogie Preprocessor took 28.53ms. Allocated memory is still 250.6MB. Free memory was 223.4MB in the beginning and 221.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 10:22:36,450 INFO L158 Benchmark]: RCFGBuilder took 287.44ms. Allocated memory is still 250.6MB. Free memory was 221.7MB in the beginning and 210.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 10:22:36,450 INFO L158 Benchmark]: IcfgTransformer took 37.45ms. Allocated memory is still 250.6MB. Free memory was 210.1MB in the beginning and 208.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 10:22:36,450 INFO L158 Benchmark]: TraceAbstraction took 121078.15ms. Allocated memory was 250.6MB in the beginning and 361.8MB in the end (delta: 111.1MB). Free memory was 208.1MB in the beginning and 231.9MB in the end (delta: -23.8MB). Peak memory consumption was 202.2MB. Max. memory is 8.0GB. [2022-03-20 10:22:36,451 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 250.6MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.56ms. Allocated memory is still 250.6MB. Free memory was 225.7MB in the beginning and 223.4MB in the end (delta: 2.4MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.53ms. Allocated memory is still 250.6MB. Free memory was 223.4MB in the beginning and 221.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 287.44ms. Allocated memory is still 250.6MB. Free memory was 221.7MB in the beginning and 210.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 37.45ms. Allocated memory is still 250.6MB. Free memory was 210.1MB in the beginning and 208.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 121078.15ms. Allocated memory was 250.6MB in the beginning and 361.8MB in the end (delta: 111.1MB). Free memory was 208.1MB in the beginning and 231.9MB in the end (delta: -23.8MB). Peak memory consumption was 202.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 121.0s, OverallIterations: 21, TraceHistogramMax: 22, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 40.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 59.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1406 SdHoareTripleChecker+Valid, 26.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1347 mSDsluCounter, 7228 SdHoareTripleChecker+Invalid, 25.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 48 IncrementalHoareTripleChecker+Unchecked, 6182 mSDsCounter, 1898 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6272 IncrementalHoareTripleChecker+Invalid, 8220 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1898 mSolverCounterUnsat, 1046 mSDtfsCounter, 6272 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2963 GetRequests, 2461 SyntacticMatches, 18 SemanticMatches, 484 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=351occurred in iteration=14, InterpolantAutomatonStates: 312, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 406 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 399 PreInvPairs, 485 NumberOfFragments, 2008 HoareAnnotationTreeSize, 399 FomulaSimplifications, 14974 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 38964 FormulaSimplificationTreeSizeReductionInter, 58.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 1571 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2616 ConstructedInterpolants, 2 QuantifiedInterpolants, 12487 SizeOfPredicates, 133 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 34 InterpolantComputations, 7 PerfectInterpolantSequences, 6397/6930 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && -1 * v / -2 <= b) && b < c) && a <= 2) && 1 <= y) && b <= c / 2 / 2) && x <= 2) || (((((((((((((((v == d * b && 1 <= x) && y <= 2) && k == 0) && s == 1) && b <= c / 2) && a == y * r + p * x) && -1 * v / -2 <= b) && b == y) && q == 0) && x <= a) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1)) || ((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && -1 * v / -2 <= b) && b < c) && a <= 2) && b <= v / 2) && 1 <= y) && x <= 2)) || (((((((((((((((v == d * b && 1 <= x) && y <= 2) && k == 0) && s == 1) && a == y * r + p * x) && b == y) && b <= c) && d == 1) && q == 0) && x <= a) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1)) || ((((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && r == 1) && a == y) && b < c) && d == 1) && 0 <= b) && q == 1) && 1 <= y) && x <= 2) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((((b < a && b < (2 + -1 * b) / 2) && 1 <= x) && y <= 2) && c < (-1 * c + 2) / 2) && q * x + a + y * s == y * r + p * x) && a == y * r + p * x) && 0 <= c) && 0 <= b) && 1 <= y) && x <= 2) || (((((((((((s == 0 && p == 0) && k == 0) && r == 1) && a == y) && b == x) && c <= 2) && b <= c) && x < a) && a <= 2) && 1 <= b) && q == 1)) || ((((((((1 <= x && y <= 2) && q * x + a + y * s == y * r + p * x) && 1 <= a) && a <= (2 + -1 * b) / 2) && c <= (b + -4) / 2 + 2) && c == 0) && 1 <= y) && x <= 2)) || (((((((((y <= 2 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && x <= 2) && p == 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((b < a && v == d * b) && y * r + b + p * x == q * x * 3 + 3 * (y * s)) && y * r + b + p * x == q * x + k * y * s + q * k * x + y * s) && b == q * x + y * s) && 1 <= x) && y <= 2) && -1 * v / -2 <= b) && (-1 + -1 * c) / -2 < b + 1) && a <= 2) && c == 0) && 1 <= y) && x <= 2) || (((((((((((v == d * b && x == c + b) && s == 1) && a == y * r + p * x) && 0 <= c) && b == y) && k == 1) && !(b <= c)) && q == 0) && a == x) && x <= 2) && p == 1)) || (((((((((((s == 0 && p == 0) && k == 0) && r == 1) && a == y) && b < c) && b == x) && c <= 2) && x < a) && a <= 2) && 1 <= b) && q == 1)) || (((((((((((y <= 2 && k == 0) && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-03-20 10:22:36,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...