/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:30:50,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:30:50,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:30:50,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 10:30:50,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 10:30:50,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 10:30:50,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 10:30:50,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 10:30:50,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 10:30:50,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 10:30:50,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 10:30:50,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 10:30:50,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:30:50,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:30:50,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:30:50,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:30:50,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:30:50,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:30:50,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:30:50,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:30:50,726 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:30:50,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:30:50,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:30:50,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:30:50,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:30:50,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 10:30:50,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 10:30:50,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 10:30:50,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 10:30:50,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 10:30:50,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-04-06 10:30:50,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:30:50,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:30:50,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:30:50,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:30:50,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:30:50,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:30:50,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:30:50,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:30:50,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:30:50,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:30:50,773 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:30:50,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:30:50,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:30:50,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:30:50,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:30:50,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:30:50,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:30:50,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:30:50,775 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:30:50,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:30:50,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:30:50,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:30:50,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:30:50,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:30:50,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:30:50,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:30:50,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:30:50,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:30:50,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:30:50,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:30:50,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:30:50,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:30:50,778 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:30:50,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:30:50,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:30:51,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:30:51,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:30:51,027 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:30:51,028 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:30:51,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 10:30:51,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fa9ba99/8d134e78a4f14d02b2b7cd323c1d2def/FLAGffa07658a [2022-04-06 10:30:51,375 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:30:51,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 10:30:51,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fa9ba99/8d134e78a4f14d02b2b7cd323c1d2def/FLAGffa07658a [2022-04-06 10:30:51,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fa9ba99/8d134e78a4f14d02b2b7cd323c1d2def [2022-04-06 10:30:51,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:30:51,820 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:30:51,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:30:51,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:30:51,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:30:51,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:30:51" (1/1) ... [2022-04-06 10:30:51,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e31dff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:51, skipping insertion in model container [2022-04-06 10:30:51,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:30:51" (1/1) ... [2022-04-06 10:30:51,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:30:51,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:30:51,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-04-06 10:30:51,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:30:52,005 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:30:52,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-04-06 10:30:52,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:30:52,030 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:30:52,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52 WrapperNode [2022-04-06 10:30:52,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:30:52,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:30:52,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:30:52,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:30:52,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:30:52,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:30:52,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:30:52,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:30:52,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:30:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:30:52,103 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) [2022-04-06 10:30:52,116 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 [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-06 10:30:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-06 10:30:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-06 10:30:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:30:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:30:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:30:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:30:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:30:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:30:52,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:30:52,195 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:30:52,197 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:30:52,310 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:30:52,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:30:52,315 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 10:30:52,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:30:52 BoogieIcfgContainer [2022-04-06 10:30:52,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:30:52,318 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:30:52,318 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:30:52,319 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:30:52,321 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:30:52" (1/1) ... [2022-04-06 10:30:52,323 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:30:52,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:30:52 BasicIcfg [2022-04-06 10:30:52,342 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:30:52,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:30:52,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:30:52,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:30:52,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:30:51" (1/4) ... [2022-04-06 10:30:52,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5ed312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:30:52, skipping insertion in model container [2022-04-06 10:30:52,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:30:52" (2/4) ... [2022-04-06 10:30:52,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5ed312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:30:52, skipping insertion in model container [2022-04-06 10:30:52,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:30:52" (3/4) ... [2022-04-06 10:30:52,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5ed312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:30:52, skipping insertion in model container [2022-04-06 10:30:52,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:30:52" (4/4) ... [2022-04-06 10:30:52,349 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.cqvasr [2022-04-06 10:30:52,353 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:30:52,353 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 10:30:52,396 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:30:52,415 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 [2022-04-06 10:30:52,415 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 10:30:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 10:30:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 10:30:52,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:52,465 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:30:52,465 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:52,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1121522138, now seen corresponding path program 1 times [2022-04-06 10:30:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:52,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492335160] [2022-04-06 10:30:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:52,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:30:52,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492335160] [2022-04-06 10:30:52,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492335160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:52,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:52,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:30:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780029171] [2022-04-06 10:30:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:52,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:30:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:30:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:30:52,853 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:30:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:53,049 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 10:30:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:30:53,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 10:30:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:53,056 INFO L225 Difference]: With dead ends: 76 [2022-04-06 10:30:53,057 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 10:30:53,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:30:53,062 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:53,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 10:30:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 10:30:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-06 10:30:53,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-04-06 10:30:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:53,103 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-06 10:30:53,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:30:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-06 10:30:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 10:30:53,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:53,105 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:53,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:30:53,106 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1342094697, now seen corresponding path program 1 times [2022-04-06 10:30:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20535405] [2022-04-06 10:30:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 10:30:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:30:53,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:53,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20535405] [2022-04-06 10:30:53,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20535405] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:53,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:53,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 10:30:53,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501347672] [2022-04-06 10:30:53,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:53,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 10:30:53,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 10:30:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-06 10:30:53,313 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:53,679 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-04-06 10:30:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 10:30:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 10:30:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:53,688 INFO L225 Difference]: With dead ends: 50 [2022-04-06 10:30:53,689 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 10:30:53,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-04-06 10:30:53,699 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:53,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:30:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 10:30:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 10:30:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 10:30:53,716 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-04-06 10:30:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:53,716 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 10:30:53,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 10:30:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 10:30:53,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:53,720 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:53,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 10:30:53,720 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1260090278, now seen corresponding path program 1 times [2022-04-06 10:30:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748187563] [2022-04-06 10:30:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:53,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 10:30:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:30:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:53,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748187563] [2022-04-06 10:30:53,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748187563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:53,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:53,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 10:30:53,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756800119] [2022-04-06 10:30:53,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:53,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:30:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:30:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:30:53,854 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:30:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:53,945 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-04-06 10:30:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:53,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-04-06 10:30:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:53,947 INFO L225 Difference]: With dead ends: 59 [2022-04-06 10:30:53,947 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 10:30:53,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 10:30:53,948 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:53,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 10:30:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-06 10:30:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-04-06 10:30:53,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 32 [2022-04-06 10:30:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:53,958 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-04-06 10:30:53,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:30:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-04-06 10:30:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 10:30:53,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:53,959 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:53,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 10:30:53,960 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1332613463, now seen corresponding path program 1 times [2022-04-06 10:30:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732226094] [2022-04-06 10:30:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 10:30:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:30:54,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732226094] [2022-04-06 10:30:54,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732226094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:54,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:54,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 10:30:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078684248] [2022-04-06 10:30:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:54,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:30:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:30:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:30:54,064 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:54,159 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-06 10:30:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:54,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-04-06 10:30:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:54,163 INFO L225 Difference]: With dead ends: 81 [2022-04-06 10:30:54,163 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 10:30:54,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 10:30:54,172 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:54,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 10:30:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-04-06 10:30:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 10:30:54,184 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2022-04-06 10:30:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:54,185 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 10:30:54,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 10:30:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 10:30:54,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:54,186 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:54,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 10:30:54,186 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1056043469, now seen corresponding path program 1 times [2022-04-06 10:30:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694963497] [2022-04-06 10:30:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 10:30:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:30:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694963497] [2022-04-06 10:30:54,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694963497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:54,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:54,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:30:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842281153] [2022-04-06 10:30:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:54,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:30:54,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:30:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:30:54,314 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:54,407 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2022-04-06 10:30:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:54,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 10:30:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:54,408 INFO L225 Difference]: With dead ends: 77 [2022-04-06 10:30:54,408 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 10:30:54,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:54,409 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:54,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 10:30:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 10:30:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-04-06 10:30:54,416 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 33 [2022-04-06 10:30:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:54,416 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-04-06 10:30:54,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-04-06 10:30:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 10:30:54,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:54,417 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:54,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 10:30:54,418 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash -934524560, now seen corresponding path program 1 times [2022-04-06 10:30:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:54,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252718960] [2022-04-06 10:30:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 10:30:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:30:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:54,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252718960] [2022-04-06 10:30:54,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252718960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:54,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:54,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:30:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882350548] [2022-04-06 10:30:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:54,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:30:54,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:54,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:30:54,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:30:54,478 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:54,574 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-04-06 10:30:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 10:30:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:54,578 INFO L225 Difference]: With dead ends: 83 [2022-04-06 10:30:54,578 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 10:30:54,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:54,580 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:54,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 10:30:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 10:30:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-04-06 10:30:54,601 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2022-04-06 10:30:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:54,601 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-04-06 10:30:54,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-04-06 10:30:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 10:30:54,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:54,602 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:54,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 10:30:54,603 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash 183625953, now seen corresponding path program 1 times [2022-04-06 10:30:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:54,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71846882] [2022-04-06 10:30:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:30:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 10:30:54,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:54,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71846882] [2022-04-06 10:30:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71846882] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:54,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:54,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:30:54,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152898426] [2022-04-06 10:30:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:54,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:30:54,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:30:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:30:54,704 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:54,837 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-06 10:30:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-04-06 10:30:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:54,838 INFO L225 Difference]: With dead ends: 57 [2022-04-06 10:30:54,838 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 10:30:54,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:54,839 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:54,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 10:30:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 10:30:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-06 10:30:54,843 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-04-06 10:30:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:54,844 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-06 10:30:54,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-06 10:30:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 10:30:54,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:54,845 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:54,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 10:30:54,845 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1980049385, now seen corresponding path program 1 times [2022-04-06 10:30:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:54,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675635092] [2022-04-06 10:30:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 10:30:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 10:30:54,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675635092] [2022-04-06 10:30:54,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675635092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:54,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:54,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:30:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593075148] [2022-04-06 10:30:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:54,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:30:54,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:30:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:30:54,933 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:55,014 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-04-06 10:30:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:55,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 10:30:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:55,020 INFO L225 Difference]: With dead ends: 64 [2022-04-06 10:30:55,020 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 10:30:55,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:55,021 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:55,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 10:30:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-04-06 10:30:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-04-06 10:30:55,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2022-04-06 10:30:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:55,025 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-04-06 10:30:55,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-06 10:30:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 10:30:55,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:55,026 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:30:55,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 10:30:55,026 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1683932512, now seen corresponding path program 1 times [2022-04-06 10:30:55,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418392540] [2022-04-06 10:30:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:55,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:30:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 10:30:55,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418392540] [2022-04-06 10:30:55,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418392540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:55,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:55,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 10:30:55,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098239727] [2022-04-06 10:30:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:55,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 10:30:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 10:30:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 10:30:55,094 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:55,188 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-04-06 10:30:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:30:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 10:30:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:55,189 INFO L225 Difference]: With dead ends: 46 [2022-04-06 10:30:55,189 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 10:30:55,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-04-06 10:30:55,191 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:55,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 49 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 10:30:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 10:30:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-06 10:30:55,203 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2022-04-06 10:30:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:55,203 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-06 10:30:55,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-06 10:30:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 10:30:55,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:55,204 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 10:30:55,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 10:30:55,205 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash 577653245, now seen corresponding path program 1 times [2022-04-06 10:30:55,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:55,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299126014] [2022-04-06 10:30:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:55,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:30:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 10:30:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:55,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299126014] [2022-04-06 10:30:55,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299126014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:30:55,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:30:55,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:30:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109239576] [2022-04-06 10:30:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:30:55,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:30:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:30:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:30:55,261 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:55,360 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-04-06 10:30:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:30:55,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 10:30:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:55,361 INFO L225 Difference]: With dead ends: 50 [2022-04-06 10:30:55,362 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 10:30:55,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:55,363 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:55,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 10:30:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 10:30:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:30:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-04-06 10:30:55,370 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-04-06 10:30:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:55,372 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-04-06 10:30:55,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-04-06 10:30:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 10:30:55,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:55,377 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-04-06 10:30:55,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 10:30:55,378 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1698211422, now seen corresponding path program 1 times [2022-04-06 10:30:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500789179] [2022-04-06 10:30:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:30:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:30:55,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500789179] [2022-04-06 10:30:55,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500789179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:30:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516123011] [2022-04-06 10:30:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:55,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:30:55,681 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) [2022-04-06 10:30:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:30:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:55,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 10:30:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:30:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:30:56,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:30:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:30:56,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516123011] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:30:56,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:30:56,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 25 [2022-04-06 10:30:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667236645] [2022-04-06 10:30:56,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:30:56,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 10:30:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 10:30:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-04-06 10:30:56,375 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:30:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:56,983 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-04-06 10:30:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 10:30:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-04-06 10:30:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:56,985 INFO L225 Difference]: With dead ends: 70 [2022-04-06 10:30:56,985 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 10:30:56,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 10:30:56,986 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:56,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 113 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:30:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 10:30:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-04-06 10:30:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-04-06 10:30:56,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-04-06 10:30:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:56,994 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-04-06 10:30:56,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:30:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-04-06 10:30:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 10:30:56,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:56,995 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 10:30:57,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 10:30:57,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 10:30:57,212 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1189593605, now seen corresponding path program 2 times [2022-04-06 10:30:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:57,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611990551] [2022-04-06 10:30:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:30:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:57,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:57,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611990551] [2022-04-06 10:30:57,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611990551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:30:57,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978618492] [2022-04-06 10:30:57,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:30:57,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:57,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:30:57,266 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) [2022-04-06 10:30:57,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 10:30:57,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:30:57,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:30:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 10:30:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:30:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:57,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:30:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:57,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978618492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:30:57,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:30:57,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-06 10:30:57,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710964717] [2022-04-06 10:30:57,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:30:57,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 10:30:57,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 10:30:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:57,478 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:30:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:57,572 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-04-06 10:30:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 10:30:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-04-06 10:30:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:57,574 INFO L225 Difference]: With dead ends: 80 [2022-04-06 10:30:57,574 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 10:30:57,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-04-06 10:30:57,575 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:57,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 10:30:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-04-06 10:30:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 10:30:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 10:30:57,581 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-04-06 10:30:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:57,581 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 10:30:57,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:30:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 10:30:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 10:30:57,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:57,583 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 10:30:57,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 10:30:57,806 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,SelfDestructingSolverStorable11 [2022-04-06 10:30:57,806 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 764427933, now seen corresponding path program 3 times [2022-04-06 10:30:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:57,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524425563] [2022-04-06 10:30:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:30:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:57,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:57,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524425563] [2022-04-06 10:30:57,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524425563] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:30:57,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474737951] [2022-04-06 10:30:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:30:57,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:30:57,955 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) [2022-04-06 10:30:57,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 10:30:58,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-06 10:30:58,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:30:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:30:58,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:30:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:58,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:30:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:58,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474737951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:30:58,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:30:58,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-04-06 10:30:58,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88592392] [2022-04-06 10:30:58,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:30:58,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 10:30:58,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 10:30:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-04-06 10:30:58,387 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:58,687 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-04-06 10:30:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 10:30:58,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 10:30:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:58,688 INFO L225 Difference]: With dead ends: 82 [2022-04-06 10:30:58,689 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 10:30:58,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:30:58,690 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:58,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:30:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 10:30:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-04-06 10:30:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 10:30:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-04-06 10:30:58,698 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-04-06 10:30:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:58,698 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-04-06 10:30:58,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:30:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-04-06 10:30:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 10:30:58,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:58,699 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 10:30:58,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 10:30:58,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:58,912 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash -781171018, now seen corresponding path program 4 times [2022-04-06 10:30:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767816533] [2022-04-06 10:30:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:58,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:58,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:58,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 10:30:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:58,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767816533] [2022-04-06 10:30:58,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767816533] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:30:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331190018] [2022-04-06 10:30:58,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:30:58,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:30:58,980 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) [2022-04-06 10:30:59,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 10:30:59,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:30:59,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:30:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 10:30:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:30:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:59,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:30:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331190018] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:30:59,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:30:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-06 10:30:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555959312] [2022-04-06 10:30:59,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:30:59,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 10:30:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:30:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 10:30:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:30:59,157 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:30:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:30:59,278 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2022-04-06 10:30:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 10:30:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-04-06 10:30:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:30:59,279 INFO L225 Difference]: With dead ends: 140 [2022-04-06 10:30:59,279 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 10:30:59,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-04-06 10:30:59,280 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:30:59,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:30:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 10:30:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-04-06 10:30:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 10:30:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-04-06 10:30:59,291 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 38 [2022-04-06 10:30:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:30:59,291 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-04-06 10:30:59,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:30:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-04-06 10:30:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 10:30:59,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:30:59,292 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 10:30:59,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 10:30:59,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:59,513 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:30:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:30:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -910305133, now seen corresponding path program 5 times [2022-04-06 10:30:59,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:30:59,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747576455] [2022-04-06 10:30:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:30:59,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:30:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:30:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:30:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:59,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 10:30:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:30:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:59,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:30:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747576455] [2022-04-06 10:30:59,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747576455] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:30:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442217356] [2022-04-06 10:30:59,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:30:59,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:30:59,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:30:59,643 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) [2022-04-06 10:30:59,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 10:30:59,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:30:59,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:30:59,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:30:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:30:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:30:59,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:00,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442217356] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:00,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:00,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-04-06 10:31:00,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595906501] [2022-04-06 10:31:00,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:00,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 10:31:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 10:31:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-04-06 10:31:00,084 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:00,426 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-04-06 10:31:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 10:31:00,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 10:31:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:00,427 INFO L225 Difference]: With dead ends: 92 [2022-04-06 10:31:00,427 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 10:31:00,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:31:00,428 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:00,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 95 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:31:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 10:31:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-04-06 10:31:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 10:31:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-04-06 10:31:00,439 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 38 [2022-04-06 10:31:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:00,440 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-04-06 10:31:00,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-04-06 10:31:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 10:31:00,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:00,440 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:31:00,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:00,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 10:31:00,641 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1615543558, now seen corresponding path program 6 times [2022-04-06 10:31:00,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580904495] [2022-04-06 10:31:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:00,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:00,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 10:31:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:00,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580904495] [2022-04-06 10:31:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580904495] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787929000] [2022-04-06 10:31:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:31:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:00,790 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) [2022-04-06 10:31:00,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 10:31:00,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 10:31:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:31:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787929000] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:01,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:01,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-04-06 10:31:01,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973180533] [2022-04-06 10:31:01,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:01,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 10:31:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 10:31:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-04-06 10:31:01,218 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:01,574 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-04-06 10:31:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 10:31:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 10:31:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:01,576 INFO L225 Difference]: With dead ends: 108 [2022-04-06 10:31:01,576 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 10:31:01,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:31:01,577 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:01,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 89 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:31:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 10:31:01,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-04-06 10:31:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 10:31:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-04-06 10:31:01,586 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 39 [2022-04-06 10:31:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:01,586 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-04-06 10:31:01,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-04-06 10:31:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 10:31:01,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:01,587 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:31:01,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:01,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 10:31:01,803 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -580280884, now seen corresponding path program 7 times [2022-04-06 10:31:01,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222148690] [2022-04-06 10:31:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:01,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:01,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 10:31:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222148690] [2022-04-06 10:31:02,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222148690] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987377836] [2022-04-06 10:31:02,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:31:02,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:02,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:02,065 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) [2022-04-06 10:31:02,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 10:31:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:02,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 10:31:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:02,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:02,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987377836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:02,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:02,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 27 [2022-04-06 10:31:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096427663] [2022-04-06 10:31:02,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:02,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 10:31:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 10:31:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:31:02,642 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:03,319 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2022-04-06 10:31:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 10:31:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-04-06 10:31:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:03,320 INFO L225 Difference]: With dead ends: 137 [2022-04-06 10:31:03,320 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 10:31:03,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 10:31:03,321 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:03,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 128 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:31:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 10:31:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-04-06 10:31:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 107 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 10:31:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2022-04-06 10:31:03,334 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 39 [2022-04-06 10:31:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:03,334 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2022-04-06 10:31:03,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2022-04-06 10:31:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 10:31:03,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:03,336 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:31:03,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:03,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:03,560 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 859850767, now seen corresponding path program 8 times [2022-04-06 10:31:03,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305998503] [2022-04-06 10:31:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:03,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305998503] [2022-04-06 10:31:03,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305998503] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033118445] [2022-04-06 10:31:03,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:31:03,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:03,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:03,719 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) [2022-04-06 10:31:03,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 10:31:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:31:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:04,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033118445] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:04,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:04,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-04-06 10:31:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277329557] [2022-04-06 10:31:04,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:04,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 10:31:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 10:31:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-04-06 10:31:04,122 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:04,448 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-04-06 10:31:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 10:31:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 10:31:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:04,450 INFO L225 Difference]: With dead ends: 132 [2022-04-06 10:31:04,450 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 10:31:04,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:31:04,451 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:04,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 101 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:31:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 10:31:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-04-06 10:31:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 104 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-06 10:31:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2022-04-06 10:31:04,462 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 39 [2022-04-06 10:31:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:04,462 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2022-04-06 10:31:04,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2022-04-06 10:31:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 10:31:04,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:04,464 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:04,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:04,679 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,SelfDestructingSolverStorable17 [2022-04-06 10:31:04,680 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1060536243, now seen corresponding path program 9 times [2022-04-06 10:31:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:04,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323633846] [2022-04-06 10:31:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:04,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:04,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:04,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 10:31:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323633846] [2022-04-06 10:31:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323633846] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982632086] [2022-04-06 10:31:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:31:04,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:04,839 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) [2022-04-06 10:31:04,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 10:31:04,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 10:31:04,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 10:31:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:05,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982632086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:05,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:05,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-04-06 10:31:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815143312] [2022-04-06 10:31:05,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:05,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 10:31:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 10:31:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-04-06 10:31:05,495 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:05,993 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2022-04-06 10:31:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 10:31:05,994 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 10:31:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:05,995 INFO L225 Difference]: With dead ends: 136 [2022-04-06 10:31:05,995 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 10:31:05,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:31:05,996 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 152 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:05,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 101 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:31:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 10:31:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-04-06 10:31:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-06 10:31:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-04-06 10:31:06,008 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 40 [2022-04-06 10:31:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:06,008 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-04-06 10:31:06,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-04-06 10:31:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 10:31:06,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:06,010 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:06,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:06,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:06,231 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash 683418749, now seen corresponding path program 10 times [2022-04-06 10:31:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635389154] [2022-04-06 10:31:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:06,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:06,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:06,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635389154] [2022-04-06 10:31:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635389154] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775370295] [2022-04-06 10:31:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:31:06,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:06,374 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) [2022-04-06 10:31:06,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 10:31:06,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:31:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:06,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 10:31:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:06,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775370295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:07,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:07,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-04-06 10:31:07,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131041524] [2022-04-06 10:31:07,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:07,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 10:31:07,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 10:31:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-04-06 10:31:07,006 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:07,654 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2022-04-06 10:31:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 10:31:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 10:31:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:07,655 INFO L225 Difference]: With dead ends: 128 [2022-04-06 10:31:07,655 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 10:31:07,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:31:07,656 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:07,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 133 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:31:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 10:31:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-04-06 10:31:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 100 states have internal predecessors, (112), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 10:31:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-04-06 10:31:07,669 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 40 [2022-04-06 10:31:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:07,669 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-04-06 10:31:07,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-04-06 10:31:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 10:31:07,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:07,670 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:07,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:07,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:07,895 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2011491521, now seen corresponding path program 11 times [2022-04-06 10:31:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192237464] [2022-04-06 10:31:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:07,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:07,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 10:31:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192237464] [2022-04-06 10:31:07,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192237464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082682290] [2022-04-06 10:31:07,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:31:07,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:07,950 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) [2022-04-06 10:31:07,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 10:31:08,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 10:31:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:08,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:08,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082682290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:08,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:08,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 10:31:08,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326869924] [2022-04-06 10:31:08,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:08,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 10:31:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:08,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 10:31:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:31:08,139 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:08,260 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2022-04-06 10:31:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 10:31:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-04-06 10:31:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:08,261 INFO L225 Difference]: With dead ends: 170 [2022-04-06 10:31:08,261 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 10:31:08,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-04-06 10:31:08,262 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:08,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 10:31:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-04-06 10:31:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 85 states have internal predecessors, (97), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-04-06 10:31:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-04-06 10:31:08,272 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2022-04-06 10:31:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:08,272 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-04-06 10:31:08,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-04-06 10:31:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 10:31:08,273 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:08,273 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:08,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:08,496 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,SelfDestructingSolverStorable20 [2022-04-06 10:31:08,496 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1799645194, now seen corresponding path program 12 times [2022-04-06 10:31:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:08,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101469149] [2022-04-06 10:31:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:08,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101469149] [2022-04-06 10:31:08,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101469149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185616703] [2022-04-06 10:31:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:31:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:08,557 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) [2022-04-06 10:31:08,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 10:31:08,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 10:31:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 10:31:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:08,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:08,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185616703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:08,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:08,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 10:31:08,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47017707] [2022-04-06 10:31:08,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:08,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 10:31:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 10:31:08,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:31:08,756 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:08,882 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-04-06 10:31:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 10:31:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-04-06 10:31:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:08,883 INFO L225 Difference]: With dead ends: 115 [2022-04-06 10:31:08,883 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 10:31:08,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-04-06 10:31:08,884 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:08,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 48 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 10:31:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 10:31:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 88 states have internal predecessors, (100), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-04-06 10:31:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-04-06 10:31:08,895 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 40 [2022-04-06 10:31:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:08,895 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-04-06 10:31:08,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-04-06 10:31:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 10:31:08,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:08,896 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:08,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:09,119 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,SelfDestructingSolverStorable21 [2022-04-06 10:31:09,120 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1580519202, now seen corresponding path program 13 times [2022-04-06 10:31:09,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:09,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297925449] [2022-04-06 10:31:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:09,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:09,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:09,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297925449] [2022-04-06 10:31:09,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297925449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:09,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693267736] [2022-04-06 10:31:09,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:31:09,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:09,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:09,441 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) [2022-04-06 10:31:09,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 10:31:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:09,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 10:31:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:09,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693267736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:09,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:09,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 29 [2022-04-06 10:31:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939496455] [2022-04-06 10:31:09,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:09,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 10:31:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 10:31:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:31:09,971 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:10,752 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-04-06 10:31:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 10:31:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-04-06 10:31:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:10,755 INFO L225 Difference]: With dead ends: 140 [2022-04-06 10:31:10,755 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 10:31:10,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 10:31:10,756 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:10,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:31:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 10:31:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-04-06 10:31:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-06 10:31:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2022-04-06 10:31:10,770 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 41 [2022-04-06 10:31:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:10,770 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2022-04-06 10:31:10,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2022-04-06 10:31:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 10:31:10,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:10,771 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:10,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 10:31:10,979 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,SelfDestructingSolverStorable22 [2022-04-06 10:31:10,979 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:10,980 INFO L85 PathProgramCache]: Analyzing trace with hash -39073241, now seen corresponding path program 14 times [2022-04-06 10:31:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:10,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058698748] [2022-04-06 10:31:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:11,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:11,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:11,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:11,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:11,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058698748] [2022-04-06 10:31:11,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058698748] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:11,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124224020] [2022-04-06 10:31:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:31:11,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:11,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:11,271 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) [2022-04-06 10:31:11,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 10:31:11,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:11,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 10:31:11,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:11,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124224020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:11,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:11,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-04-06 10:31:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843342787] [2022-04-06 10:31:11,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:11,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 10:31:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 10:31:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:31:11,895 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:12,503 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-04-06 10:31:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 10:31:12,504 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-04-06 10:31:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:12,505 INFO L225 Difference]: With dead ends: 134 [2022-04-06 10:31:12,505 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 10:31:12,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 10:31:12,507 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:12,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 141 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:31:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 10:31:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-04-06 10:31:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 112 states have internal predecessors, (124), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 10:31:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-04-06 10:31:12,518 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2022-04-06 10:31:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:12,519 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-04-06 10:31:12,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-04-06 10:31:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 10:31:12,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:12,520 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:12,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:12,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:12,740 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash -674137827, now seen corresponding path program 15 times [2022-04-06 10:31:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:12,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680953592] [2022-04-06 10:31:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:12,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680953592] [2022-04-06 10:31:12,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680953592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187711124] [2022-04-06 10:31:12,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:31:12,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:12,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:12,939 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) [2022-04-06 10:31:12,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 10:31:12,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 10:31:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 10:31:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:13,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:13,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187711124] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:13,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:13,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-06 10:31:13,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519782163] [2022-04-06 10:31:13,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:13,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 10:31:13,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 10:31:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:31:13,614 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:14,370 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2022-04-06 10:31:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 10:31:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 10:31:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:14,371 INFO L225 Difference]: With dead ends: 152 [2022-04-06 10:31:14,371 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 10:31:14,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:31:14,373 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 264 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:14,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 121 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:31:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 10:31:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2022-04-06 10:31:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 115 states have internal predecessors, (129), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 10:31:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-04-06 10:31:14,389 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 42 [2022-04-06 10:31:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:14,389 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-04-06 10:31:14,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-04-06 10:31:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 10:31:14,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:14,390 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:14,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:14,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:14,591 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash 520121747, now seen corresponding path program 16 times [2022-04-06 10:31:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137023745] [2022-04-06 10:31:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:14,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:14,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:14,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 10:31:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137023745] [2022-04-06 10:31:14,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137023745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471194360] [2022-04-06 10:31:14,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:31:14,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:14,790 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) [2022-04-06 10:31:14,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 10:31:14,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:31:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 10:31:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:15,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:15,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471194360] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:15,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:15,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-06 10:31:15,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894889022] [2022-04-06 10:31:15,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:15,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 10:31:15,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 10:31:15,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:31:15,519 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:16,298 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-04-06 10:31:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 10:31:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 10:31:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:16,300 INFO L225 Difference]: With dead ends: 144 [2022-04-06 10:31:16,300 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 10:31:16,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:31:16,301 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 270 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:16,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 128 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:31:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 10:31:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 10:31:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 116 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 10:31:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2022-04-06 10:31:16,317 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 42 [2022-04-06 10:31:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:16,317 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2022-04-06 10:31:16,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2022-04-06 10:31:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 10:31:16,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:16,319 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:16,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:16,535 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,SelfDestructingSolverStorable25 [2022-04-06 10:31:16,536 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1295917546, now seen corresponding path program 17 times [2022-04-06 10:31:16,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:16,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891743617] [2022-04-06 10:31:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:16,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:16,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:16,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891743617] [2022-04-06 10:31:16,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891743617] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529604755] [2022-04-06 10:31:16,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:31:16,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:16,599 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) [2022-04-06 10:31:16,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 10:31:16,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-06 10:31:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 10:31:16,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529604755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:16,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:16,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-06 10:31:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008534474] [2022-04-06 10:31:16,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:16,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 10:31:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 10:31:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 10:31:16,808 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:16,966 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2022-04-06 10:31:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 10:31:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-04-06 10:31:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:16,967 INFO L225 Difference]: With dead ends: 186 [2022-04-06 10:31:16,967 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 10:31:16,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-04-06 10:31:16,968 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:16,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 10:31:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2022-04-06 10:31:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.2265625) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 10:31:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2022-04-06 10:31:16,988 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 42 [2022-04-06 10:31:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:16,988 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2022-04-06 10:31:16,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2022-04-06 10:31:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 10:31:16,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:16,989 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:17,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:17,207 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,SelfDestructingSolverStorable26 [2022-04-06 10:31:17,208 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash 817928577, now seen corresponding path program 18 times [2022-04-06 10:31:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:17,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230223612] [2022-04-06 10:31:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:17,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:17,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:17,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 10:31:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:17,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230223612] [2022-04-06 10:31:17,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230223612] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599634835] [2022-04-06 10:31:17,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:31:17,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:17,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:17,277 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) [2022-04-06 10:31:17,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 10:31:17,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 10:31:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:17,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 10:31:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 10:31:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599634835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:17,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-06 10:31:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020659864] [2022-04-06 10:31:17,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:17,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 10:31:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 10:31:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 10:31:17,482 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:17,652 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2022-04-06 10:31:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 10:31:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-04-06 10:31:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:17,653 INFO L225 Difference]: With dead ends: 290 [2022-04-06 10:31:17,653 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 10:31:17,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-04-06 10:31:17,655 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:17,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 53 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 10:31:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-04-06 10:31:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 160 states have internal predecessors, (184), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 10:31:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2022-04-06 10:31:17,680 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 42 [2022-04-06 10:31:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:17,680 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2022-04-06 10:31:17,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2022-04-06 10:31:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 10:31:17,681 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:17,681 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:17,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 10:31:17,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 10:31:17,904 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash 813279436, now seen corresponding path program 19 times [2022-04-06 10:31:17,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:17,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579608445] [2022-04-06 10:31:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:17,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:17,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 10:31:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:18,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579608445] [2022-04-06 10:31:18,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579608445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129075708] [2022-04-06 10:31:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:31:18,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:18,277 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) [2022-04-06 10:31:18,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 10:31:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 10:31:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:18,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:18,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129075708] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:18,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:18,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 31 [2022-04-06 10:31:18,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690954457] [2022-04-06 10:31:18,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:18,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 10:31:18,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:18,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 10:31:18,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:31:18,877 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:19,879 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-04-06 10:31:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 10:31:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-04-06 10:31:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:19,882 INFO L225 Difference]: With dead ends: 224 [2022-04-06 10:31:19,882 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 10:31:19,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 10:31:19,888 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 128 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:19,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 180 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:31:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 10:31:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2022-04-06 10:31:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 175 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-04-06 10:31:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2022-04-06 10:31:19,918 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 43 [2022-04-06 10:31:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:19,918 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2022-04-06 10:31:19,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2022-04-06 10:31:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 10:31:19,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:19,933 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:19,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:20,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 10:31:20,147 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1078382385, now seen corresponding path program 20 times [2022-04-06 10:31:20,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:20,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75406739] [2022-04-06 10:31:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:20,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:20,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:20,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 10:31:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 10:31:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75406739] [2022-04-06 10:31:20,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75406739] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:20,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596324332] [2022-04-06 10:31:20,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:31:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:20,333 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) [2022-04-06 10:31:20,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 10:31:20,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 10:31:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:31:20,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:31:20,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596324332] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:20,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:20,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-04-06 10:31:20,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604190963] [2022-04-06 10:31:20,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:20,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 10:31:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 10:31:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:31:20,888 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:21,435 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2022-04-06 10:31:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 10:31:21,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 10:31:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:21,437 INFO L225 Difference]: With dead ends: 230 [2022-04-06 10:31:21,437 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 10:31:21,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:31:21,439 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:21,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 114 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:31:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 10:31:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-04-06 10:31:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 192 states have internal predecessors, (209), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-04-06 10:31:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-04-06 10:31:21,464 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2022-04-06 10:31:21,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:21,464 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-04-06 10:31:21,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-04-06 10:31:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 10:31:21,466 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:21,466 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:21,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:21,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:21,689 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash 236349687, now seen corresponding path program 21 times [2022-04-06 10:31:21,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:21,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181158093] [2022-04-06 10:31:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:21,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:21,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:21,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 10:31:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:21,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:21,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181158093] [2022-04-06 10:31:21,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181158093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:21,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786891361] [2022-04-06 10:31:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:31:21,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:21,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:21,996 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:22,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 10:31:22,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-06 10:31:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 10:31:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:22,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:22,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786891361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:22,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:22,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 31 [2022-04-06 10:31:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648521387] [2022-04-06 10:31:22,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:22,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 10:31:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 10:31:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:31:22,616 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:23,443 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2022-04-06 10:31:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 10:31:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-04-06 10:31:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:23,445 INFO L225 Difference]: With dead ends: 228 [2022-04-06 10:31:23,445 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 10:31:23,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 10:31:23,447 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:23,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 153 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:31:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 10:31:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-04-06 10:31:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 190 states have internal predecessors, (208), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-04-06 10:31:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2022-04-06 10:31:23,476 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 43 [2022-04-06 10:31:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:23,476 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2022-04-06 10:31:23,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2022-04-06 10:31:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 10:31:23,478 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:23,478 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:23,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:23,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:23,691 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1032734298, now seen corresponding path program 22 times [2022-04-06 10:31:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:23,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036284820] [2022-04-06 10:31:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:23,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:23,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 10:31:23,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036284820] [2022-04-06 10:31:23,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036284820] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974999461] [2022-04-06 10:31:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:31:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:23,890 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:23,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 10:31:23,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:31:23,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 10:31:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:31:24,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:31:24,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974999461] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:24,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:24,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-04-06 10:31:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122603414] [2022-04-06 10:31:24,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:24,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 10:31:24,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 10:31:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:31:24,483 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:24,987 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2022-04-06 10:31:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 10:31:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 10:31:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:24,988 INFO L225 Difference]: With dead ends: 222 [2022-04-06 10:31:24,988 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 10:31:24,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:31:24,990 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 223 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:24,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 102 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:31:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 10:31:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-04-06 10:31:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 182 states have internal predecessors, (198), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-04-06 10:31:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2022-04-06 10:31:25,019 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 43 [2022-04-06 10:31:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:25,019 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2022-04-06 10:31:25,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2022-04-06 10:31:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 10:31:25,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:25,021 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:25,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 10:31:25,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:25,244 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1311233203, now seen corresponding path program 23 times [2022-04-06 10:31:25,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:25,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594166545] [2022-04-06 10:31:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:25,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:25,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:25,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 10:31:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:25,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594166545] [2022-04-06 10:31:25,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594166545] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:25,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242608229] [2022-04-06 10:31:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:31:25,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:25,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 10:31:25,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 10:31:25,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 10:31:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:25,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:26,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242608229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:26,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:26,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-04-06 10:31:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406687566] [2022-04-06 10:31:26,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:26,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 10:31:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 10:31:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:31:26,402 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:27,600 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2022-04-06 10:31:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 10:31:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 10:31:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:27,601 INFO L225 Difference]: With dead ends: 244 [2022-04-06 10:31:27,601 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 10:31:27,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 10:31:27,604 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 338 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:27,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 176 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:31:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 10:31:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-04-06 10:31:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 202 states have internal predecessors, (220), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-04-06 10:31:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2022-04-06 10:31:27,638 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 44 [2022-04-06 10:31:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:27,638 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2022-04-06 10:31:27,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2022-04-06 10:31:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 10:31:27,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:27,641 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:27,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 10:31:27,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:27,855 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -321425667, now seen corresponding path program 24 times [2022-04-06 10:31:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:27,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678063588] [2022-04-06 10:31:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:27,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:27,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:27,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:28,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678063588] [2022-04-06 10:31:28,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678063588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839466182] [2022-04-06 10:31:28,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:31:28,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:28,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:28,102 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:28,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 10:31:28,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:31:28,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:28,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 10:31:28,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:28,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:28,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839466182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:28,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:28,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-04-06 10:31:28,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535115793] [2022-04-06 10:31:28,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:28,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 10:31:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 10:31:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:31:28,929 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:30,050 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2022-04-06 10:31:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 10:31:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 10:31:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:30,052 INFO L225 Difference]: With dead ends: 236 [2022-04-06 10:31:30,052 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 10:31:30,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 10:31:30,054 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 392 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:30,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 153 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:31:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 10:31:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-04-06 10:31:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 203 states have internal predecessors, (221), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-04-06 10:31:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-04-06 10:31:30,090 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 44 [2022-04-06 10:31:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:30,090 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-04-06 10:31:30,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-04-06 10:31:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 10:31:30,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:30,092 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:30,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:30,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:30,306 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1285627670, now seen corresponding path program 25 times [2022-04-06 10:31:30,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:30,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728932956] [2022-04-06 10:31:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:30,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:30,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:30,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 10:31:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:30,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728932956] [2022-04-06 10:31:30,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728932956] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349683664] [2022-04-06 10:31:30,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:31:30,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:30,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:30,374 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:30,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 10:31:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 10:31:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:30,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:30,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349683664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:30,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:30,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-06 10:31:30,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847486484] [2022-04-06 10:31:30,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:30,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 10:31:30,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 10:31:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 10:31:30,568 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:30,756 INFO L93 Difference]: Finished difference Result 339 states and 391 transitions. [2022-04-06 10:31:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 10:31:30,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-04-06 10:31:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:30,758 INFO L225 Difference]: With dead ends: 339 [2022-04-06 10:31:30,758 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 10:31:30,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-04-06 10:31:30,759 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:30,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 62 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 10:31:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2022-04-06 10:31:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 190 states have internal predecessors, (208), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-04-06 10:31:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2022-04-06 10:31:30,795 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 44 [2022-04-06 10:31:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:30,795 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2022-04-06 10:31:30,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2022-04-06 10:31:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 10:31:30,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:30,797 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:30,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:31,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 10:31:31,020 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1442855301, now seen corresponding path program 26 times [2022-04-06 10:31:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:31,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902196630] [2022-04-06 10:31:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:31,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:31,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:31,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902196630] [2022-04-06 10:31:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902196630] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647100333] [2022-04-06 10:31:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:31:31,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:31,091 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:31,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 10:31:31,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:31,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 10:31:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:31,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:31,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647100333] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:31,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:31,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-06 10:31:31,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478006988] [2022-04-06 10:31:31,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:31,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 10:31:31,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:31,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 10:31:31,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 10:31:31,289 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:31,546 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-04-06 10:31:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 10:31:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-06 10:31:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:31,547 INFO L225 Difference]: With dead ends: 233 [2022-04-06 10:31:31,548 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 10:31:31,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-04-06 10:31:31,549 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:31,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 10:31:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 10:31:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-04-06 10:31:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2022-04-06 10:31:31,587 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 44 [2022-04-06 10:31:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:31,587 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2022-04-06 10:31:31,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2022-04-06 10:31:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 10:31:31,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:31,589 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-04-06 10:31:31,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:31,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 10:31:31,803 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash 495113378, now seen corresponding path program 27 times [2022-04-06 10:31:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:31,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707581791] [2022-04-06 10:31:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:31,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:31,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:32,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:32,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707581791] [2022-04-06 10:31:32,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707581791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649669722] [2022-04-06 10:31:32,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:31:32,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:32,184 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:32,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 10:31:32,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 10:31:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 10:31:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:32,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:32,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649669722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:32,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:32,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 33 [2022-04-06 10:31:32,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131173078] [2022-04-06 10:31:32,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:32,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 10:31:32,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 10:31:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 10:31:32,735 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:33,881 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2022-04-06 10:31:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 10:31:33,881 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-04-06 10:31:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:33,883 INFO L225 Difference]: With dead ends: 270 [2022-04-06 10:31:33,883 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 10:31:33,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 10:31:33,884 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 145 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:33,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 198 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 10:31:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 10:31:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2022-04-06 10:31:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.1875) internal successors, (228), 210 states have internal predecessors, (228), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-04-06 10:31:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 264 transitions. [2022-04-06 10:31:33,926 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 264 transitions. Word has length 45 [2022-04-06 10:31:33,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:33,926 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 264 transitions. [2022-04-06 10:31:33,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 264 transitions. [2022-04-06 10:31:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 10:31:33,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:33,928 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:33,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:34,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 10:31:34,151 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash 163503975, now seen corresponding path program 28 times [2022-04-06 10:31:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:34,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659793740] [2022-04-06 10:31:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:34,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:34,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659793740] [2022-04-06 10:31:34,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659793740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634171211] [2022-04-06 10:31:34,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:31:34,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:34,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:34,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:34,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 10:31:34,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:31:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 10:31:34,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:34,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:35,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634171211] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:35,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 33 [2022-04-06 10:31:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615737638] [2022-04-06 10:31:35,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:35,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 10:31:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 10:31:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 10:31:35,135 INFO L87 Difference]: Start difference. First operand 228 states and 264 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:36,058 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2022-04-06 10:31:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 10:31:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-04-06 10:31:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:36,059 INFO L225 Difference]: With dead ends: 234 [2022-04-06 10:31:36,059 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 10:31:36,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=2873, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 10:31:36,061 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:36,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 176 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:31:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 10:31:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 10:31:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-04-06 10:31:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2022-04-06 10:31:36,097 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 45 [2022-04-06 10:31:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:36,097 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2022-04-06 10:31:36,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2022-04-06 10:31:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 10:31:36,099 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:36,099 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:36,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 10:31:36,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:36,315 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1863488446, now seen corresponding path program 29 times [2022-04-06 10:31:36,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:36,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431053198] [2022-04-06 10:31:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:36,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:31:36,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:36,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431053198] [2022-04-06 10:31:36,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431053198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:36,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47200613] [2022-04-06 10:31:36,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:31:36,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:36,636 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:36,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 10:31:36,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-06 10:31:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 10:31:36,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:31:37,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:31:37,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47200613] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:37,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:37,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-04-06 10:31:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292223438] [2022-04-06 10:31:37,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:37,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 10:31:37,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 10:31:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 10:31:37,351 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:38,072 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2022-04-06 10:31:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 10:31:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-04-06 10:31:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:38,074 INFO L225 Difference]: With dead ends: 230 [2022-04-06 10:31:38,074 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 10:31:38,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 10:31:38,075 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:38,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:31:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 10:31:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-04-06 10:31:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 204 states have internal predecessors, (222), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2022-04-06 10:31:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-04-06 10:31:38,113 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 45 [2022-04-06 10:31:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:38,113 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-04-06 10:31:38,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-04-06 10:31:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 10:31:38,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:38,115 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 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] [2022-04-06 10:31:38,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:38,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 10:31:38,337 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash 38019997, now seen corresponding path program 30 times [2022-04-06 10:31:38,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369992298] [2022-04-06 10:31:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:38,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:38,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:38,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:38,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369992298] [2022-04-06 10:31:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369992298] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699619658] [2022-04-06 10:31:38,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:31:38,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:38,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:38,611 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:38,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 10:31:38,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:31:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 10:31:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:39,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:39,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699619658] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:39,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:39,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-04-06 10:31:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682216811] [2022-04-06 10:31:39,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:39,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:31:39,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:31:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:31:39,664 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:41,291 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2022-04-06 10:31:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 10:31:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 10:31:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:41,293 INFO L225 Difference]: With dead ends: 268 [2022-04-06 10:31:41,293 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 10:31:41,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 10:31:41,295 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 482 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:41,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 191 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 10:31:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 10:31:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-04-06 10:31:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 226 states have internal predecessors, (246), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-04-06 10:31:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2022-04-06 10:31:41,341 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 46 [2022-04-06 10:31:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:41,341 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2022-04-06 10:31:41,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2022-04-06 10:31:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 10:31:41,343 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:41,343 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 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] [2022-04-06 10:31:41,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 10:31:41,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 10:31:41,555 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash 965202579, now seen corresponding path program 31 times [2022-04-06 10:31:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:41,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750946271] [2022-04-06 10:31:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:41,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:41,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:31:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:41,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750946271] [2022-04-06 10:31:41,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750946271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449861207] [2022-04-06 10:31:41,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:31:41,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:41,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:41,799 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:41,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 10:31:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 10:31:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:42,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:42,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449861207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:42,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:42,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-04-06 10:31:42,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170544305] [2022-04-06 10:31:42,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:42,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:31:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:31:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:31:42,715 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:44,456 INFO L93 Difference]: Finished difference Result 260 states and 302 transitions. [2022-04-06 10:31:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 10:31:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 10:31:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:44,457 INFO L225 Difference]: With dead ends: 260 [2022-04-06 10:31:44,457 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 10:31:44,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 10:31:44,458 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 488 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:44,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 198 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 10:31:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 10:31:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-04-06 10:31:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 227 states have internal predecessors, (247), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-06 10:31:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2022-04-06 10:31:44,507 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 46 [2022-04-06 10:31:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:44,507 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2022-04-06 10:31:44,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2022-04-06 10:31:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 10:31:44,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:44,509 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:44,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:44,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:44,732 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2018214053, now seen corresponding path program 32 times [2022-04-06 10:31:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167221542] [2022-04-06 10:31:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:44,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:44,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:44,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:44,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167221542] [2022-04-06 10:31:44,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167221542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:44,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456375833] [2022-04-06 10:31:44,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:31:44,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:44,813 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:44,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 10:31:44,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:44,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:44,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 10:31:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:44,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456375833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:45,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:45,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-04-06 10:31:45,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405041564] [2022-04-06 10:31:45,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:45,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 10:31:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 10:31:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:31:45,053 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:45,367 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2022-04-06 10:31:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 10:31:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-04-06 10:31:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:45,369 INFO L225 Difference]: With dead ends: 332 [2022-04-06 10:31:45,369 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 10:31:45,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:31:45,371 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:45,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 82 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 10:31:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2022-04-06 10:31:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 265 states have internal predecessors, (292), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-06 10:31:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-04-06 10:31:45,441 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 46 [2022-04-06 10:31:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:45,441 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-04-06 10:31:45,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:31:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-04-06 10:31:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 10:31:45,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:45,443 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:45,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:45,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:45,667 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash -701840234, now seen corresponding path program 33 times [2022-04-06 10:31:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:45,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558223474] [2022-04-06 10:31:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:45,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:45,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:31:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558223474] [2022-04-06 10:31:45,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558223474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248335496] [2022-04-06 10:31:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:31:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:45,733 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:45,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 10:31:45,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 10:31:45,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 10:31:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:45,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 10:31:45,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248335496] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:45,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:45,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-04-06 10:31:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523576725] [2022-04-06 10:31:45,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:45,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 10:31:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 10:31:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:31:45,937 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:46,174 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2022-04-06 10:31:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 10:31:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-04-06 10:31:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:46,176 INFO L225 Difference]: With dead ends: 525 [2022-04-06 10:31:46,176 INFO L226 Difference]: Without dead ends: 340 [2022-04-06 10:31:46,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:31:46,178 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:46,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:31:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-04-06 10:31:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2022-04-06 10:31:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-04-06 10:31:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2022-04-06 10:31:46,246 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 46 [2022-04-06 10:31:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:46,246 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2022-04-06 10:31:46,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2022-04-06 10:31:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 10:31:46,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:46,249 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 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] [2022-04-06 10:31:46,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:46,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 10:31:46,471 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1725883340, now seen corresponding path program 34 times [2022-04-06 10:31:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:46,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291174453] [2022-04-06 10:31:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:46,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:46,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:31:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:46,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291174453] [2022-04-06 10:31:46,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291174453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284329411] [2022-04-06 10:31:46,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:31:46,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:46,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:46,884 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:46,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 10:31:46,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:31:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 10:31:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:47,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:31:47,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284329411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:47,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:47,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 35 [2022-04-06 10:31:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118472178] [2022-04-06 10:31:47,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:47,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 10:31:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 10:31:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 10:31:47,448 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:48,828 INFO L93 Difference]: Finished difference Result 392 states and 457 transitions. [2022-04-06 10:31:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:31:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-04-06 10:31:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:48,830 INFO L225 Difference]: With dead ends: 392 [2022-04-06 10:31:48,830 INFO L226 Difference]: Without dead ends: 386 [2022-04-06 10:31:48,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=3565, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 10:31:48,831 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 170 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:48,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 215 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 10:31:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-04-06 10:31:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2022-04-06 10:31:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 296 states have (on average 1.1891891891891893) internal successors, (352), 318 states have internal predecessors, (352), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-04-06 10:31:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 395 transitions. [2022-04-06 10:31:48,912 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 395 transitions. Word has length 47 [2022-04-06 10:31:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:48,912 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 395 transitions. [2022-04-06 10:31:48,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 395 transitions. [2022-04-06 10:31:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 10:31:48,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:48,914 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-04-06 10:31:48,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:49,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:49,127 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:49,128 INFO L85 PathProgramCache]: Analyzing trace with hash -821910985, now seen corresponding path program 35 times [2022-04-06 10:31:49,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260617437] [2022-04-06 10:31:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:49,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:49,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:49,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:31:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260617437] [2022-04-06 10:31:49,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260617437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566306698] [2022-04-06 10:31:49,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:31:49,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:49,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:49,490 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:49,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 10:31:49,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-06 10:31:49,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 10:31:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:49,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:31:50,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566306698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:50,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:50,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 35 [2022-04-06 10:31:50,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385545797] [2022-04-06 10:31:50,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:50,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 10:31:50,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 10:31:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 10:31:50,124 INFO L87 Difference]: Start difference. First operand 338 states and 395 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:51,293 INFO L93 Difference]: Finished difference Result 344 states and 400 transitions. [2022-04-06 10:31:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 10:31:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-04-06 10:31:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:51,294 INFO L225 Difference]: With dead ends: 344 [2022-04-06 10:31:51,294 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 10:31:51,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 10:31:51,296 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:51,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 185 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:31:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 10:31:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-04-06 10:31:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-04-06 10:31:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2022-04-06 10:31:51,364 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 47 [2022-04-06 10:31:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:51,365 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2022-04-06 10:31:51,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2022-04-06 10:31:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 10:31:51,367 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:51,367 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-04-06 10:31:51,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:51,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 10:31:51,579 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 870449050, now seen corresponding path program 36 times [2022-04-06 10:31:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:51,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928128565] [2022-04-06 10:31:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:51,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:51,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 10:31:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 10:31:51,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:51,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928128565] [2022-04-06 10:31:51,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928128565] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:51,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059153726] [2022-04-06 10:31:51,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:31:51,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:51,793 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:51,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 10:31:51,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 10:31:51,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 10:31:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 10:31:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 10:31:52,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059153726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:52,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:52,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-04-06 10:31:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413055313] [2022-04-06 10:31:52,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:52,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 10:31:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 10:31:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 10:31:52,488 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:53,381 INFO L93 Difference]: Finished difference Result 378 states and 443 transitions. [2022-04-06 10:31:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 10:31:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 10:31:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:53,383 INFO L225 Difference]: With dead ends: 378 [2022-04-06 10:31:53,383 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 10:31:53,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:31:53,385 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 270 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:53,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 151 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:31:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 10:31:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-04-06 10:31:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 303 states have (on average 1.174917491749175) internal successors, (356), 333 states have internal predecessors, (356), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-04-06 10:31:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 416 transitions. [2022-04-06 10:31:53,450 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 416 transitions. Word has length 47 [2022-04-06 10:31:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:53,450 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 416 transitions. [2022-04-06 10:31:53,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 416 transitions. [2022-04-06 10:31:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 10:31:53,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:53,454 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:31:53,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:53,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:53,676 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -545415892, now seen corresponding path program 37 times [2022-04-06 10:31:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997241220] [2022-04-06 10:31:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:53,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:53,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:53,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:31:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:31:54,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:54,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997241220] [2022-04-06 10:31:54,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997241220] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:54,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316747984] [2022-04-06 10:31:54,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:31:54,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:54,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:54,008 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:54,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 10:31:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 10:31:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:31:54,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:31:54,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316747984] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:54,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:54,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 35 [2022-04-06 10:31:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298430307] [2022-04-06 10:31:54,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:54,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 10:31:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 10:31:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 10:31:54,688 INFO L87 Difference]: Start difference. First operand 357 states and 416 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:55,502 INFO L93 Difference]: Finished difference Result 375 states and 438 transitions. [2022-04-06 10:31:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 10:31:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-04-06 10:31:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:55,504 INFO L225 Difference]: With dead ends: 375 [2022-04-06 10:31:55,504 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 10:31:55,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=3085, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 10:31:55,507 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:55,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 158 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:31:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 10:31:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 354. [2022-04-06 10:31:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.18) internal successors, (354), 330 states have internal predecessors, (354), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-04-06 10:31:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 414 transitions. [2022-04-06 10:31:55,573 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 414 transitions. Word has length 47 [2022-04-06 10:31:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:55,573 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 414 transitions. [2022-04-06 10:31:55,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:31:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 414 transitions. [2022-04-06 10:31:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 10:31:55,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:55,577 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-04-06 10:31:55,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:55,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 10:31:55,791 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:55,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 942955759, now seen corresponding path program 38 times [2022-04-06 10:31:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:55,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054384482] [2022-04-06 10:31:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:55,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:55,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:31:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 10:31:56,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054384482] [2022-04-06 10:31:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054384482] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610157656] [2022-04-06 10:31:56,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:31:56,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:56,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:56,002 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:56,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 10:31:56,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:31:56,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 10:31:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 10:31:56,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 10:31:56,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610157656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:56,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:56,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-04-06 10:31:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546608050] [2022-04-06 10:31:56,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:56,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 10:31:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 10:31:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 10:31:56,616 INFO L87 Difference]: Start difference. First operand 354 states and 414 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:57,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:31:57,481 INFO L93 Difference]: Finished difference Result 368 states and 427 transitions. [2022-04-06 10:31:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 10:31:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 10:31:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:31:57,483 INFO L225 Difference]: With dead ends: 368 [2022-04-06 10:31:57,483 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 10:31:57,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:31:57,485 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 330 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:31:57,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 139 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:31:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 10:31:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-04-06 10:31:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 320 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-04-06 10:31:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 398 transitions. [2022-04-06 10:31:57,559 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 398 transitions. Word has length 47 [2022-04-06 10:31:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:31:57,559 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 398 transitions. [2022-04-06 10:31:57,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:31:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 398 transitions. [2022-04-06 10:31:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 10:31:57,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:31:57,562 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 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] [2022-04-06 10:31:57,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 10:31:57,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 10:31:57,775 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:31:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:31:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash -462816845, now seen corresponding path program 39 times [2022-04-06 10:31:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:31:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745916059] [2022-04-06 10:31:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:31:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:31:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:31:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:31:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:31:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:31:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:31:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745916059] [2022-04-06 10:31:58,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745916059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:31:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904310657] [2022-04-06 10:31:58,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:31:58,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:31:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:31:58,058 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:31:58,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 10:31:58,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 10:31:58,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:31:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 10:31:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:31:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:58,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:31:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:31:59,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904310657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:31:59,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:31:59,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-04-06 10:31:59,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282406502] [2022-04-06 10:31:59,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:31:59,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:31:59,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:31:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:31:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:31:59,201 INFO L87 Difference]: Start difference. First operand 344 states and 398 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:01,375 INFO L93 Difference]: Finished difference Result 410 states and 477 transitions. [2022-04-06 10:32:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 10:32:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 10:32:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:01,378 INFO L225 Difference]: With dead ends: 410 [2022-04-06 10:32:01,378 INFO L226 Difference]: Without dead ends: 396 [2022-04-06 10:32:01,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 10:32:01,380 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 600 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:01,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 226 Invalid, 3374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3293 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:32:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-04-06 10:32:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 387. [2022-04-06 10:32:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 327 states have (on average 1.1773700305810397) internal successors, (385), 361 states have internal predecessors, (385), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-04-06 10:32:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 449 transitions. [2022-04-06 10:32:01,469 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 449 transitions. Word has length 48 [2022-04-06 10:32:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:01,469 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 449 transitions. [2022-04-06 10:32:01,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 449 transitions. [2022-04-06 10:32:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 10:32:01,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:01,473 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 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] [2022-04-06 10:32:01,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:01,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 10:32:01,678 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1784927875, now seen corresponding path program 40 times [2022-04-06 10:32:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:01,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791575026] [2022-04-06 10:32:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:01,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:01,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791575026] [2022-04-06 10:32:01,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791575026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097491063] [2022-04-06 10:32:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:32:01,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:01,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:01,978 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:01,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 10:32:02,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:32:02,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 10:32:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:02,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:03,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097491063] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:03,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:03,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-04-06 10:32:03,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040322206] [2022-04-06 10:32:03,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:03,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:32:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:32:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:32:03,064 INFO L87 Difference]: Start difference. First operand 387 states and 449 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:05,177 INFO L93 Difference]: Finished difference Result 402 states and 464 transitions. [2022-04-06 10:32:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 10:32:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 10:32:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:05,179 INFO L225 Difference]: With dead ends: 402 [2022-04-06 10:32:05,179 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 10:32:05,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 10:32:05,181 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 683 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:05,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 208 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 10:32:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 10:32:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-04-06 10:32:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 328 states have (on average 1.1768292682926829) internal successors, (386), 362 states have internal predecessors, (386), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-06 10:32:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 447 transitions. [2022-04-06 10:32:05,248 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 447 transitions. Word has length 48 [2022-04-06 10:32:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:05,248 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 447 transitions. [2022-04-06 10:32:05,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 447 transitions. [2022-04-06 10:32:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 10:32:05,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:05,251 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:05,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 10:32:05,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 10:32:05,454 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 319517281, now seen corresponding path program 41 times [2022-04-06 10:32:05,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:05,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29899274] [2022-04-06 10:32:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:05,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:05,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:05,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 10:32:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:05,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:05,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29899274] [2022-04-06 10:32:05,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29899274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:05,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50261608] [2022-04-06 10:32:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:32:05,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:05,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:05,533 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:05,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 10:32:05,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-06 10:32:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 10:32:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:05,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:05,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50261608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:05,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:05,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-04-06 10:32:05,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615413055] [2022-04-06 10:32:05,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:05,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 10:32:05,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 10:32:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 10:32:05,788 INFO L87 Difference]: Start difference. First operand 388 states and 447 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:06,089 INFO L93 Difference]: Finished difference Result 593 states and 672 transitions. [2022-04-06 10:32:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 10:32:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-04-06 10:32:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:06,092 INFO L225 Difference]: With dead ends: 593 [2022-04-06 10:32:06,092 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 10:32:06,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:32:06,094 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:06,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 66 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:32:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 10:32:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2022-04-06 10:32:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 351 states have internal predecessors, (375), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-04-06 10:32:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2022-04-06 10:32:06,169 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 48 [2022-04-06 10:32:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:06,169 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2022-04-06 10:32:06,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2022-04-06 10:32:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 10:32:06,172 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:06,172 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:06,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 10:32:06,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:06,384 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -392786666, now seen corresponding path program 42 times [2022-04-06 10:32:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361513532] [2022-04-06 10:32:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:06,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:06,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361513532] [2022-04-06 10:32:06,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361513532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274979999] [2022-04-06 10:32:06,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:32:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:06,464 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:06,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 10:32:06,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 10:32:06,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 10:32:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:06,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274979999] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:06,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:06,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-04-06 10:32:06,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193649037] [2022-04-06 10:32:06,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:06,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 10:32:06,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 10:32:06,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 10:32:06,681 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:32:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:06,964 INFO L93 Difference]: Finished difference Result 409 states and 468 transitions. [2022-04-06 10:32:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 10:32:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-04-06 10:32:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:06,967 INFO L225 Difference]: With dead ends: 409 [2022-04-06 10:32:06,967 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 10:32:06,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:32:06,968 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:06,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 66 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:32:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 10:32:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-04-06 10:32:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-04-06 10:32:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2022-04-06 10:32:07,051 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 48 [2022-04-06 10:32:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:07,051 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2022-04-06 10:32:07,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:32:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2022-04-06 10:32:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 10:32:07,053 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:07,053 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 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] [2022-04-06 10:32:07,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 10:32:07,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:07,254 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1923782110, now seen corresponding path program 43 times [2022-04-06 10:32:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:07,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855644609] [2022-04-06 10:32:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:07,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:07,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:07,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:32:07,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:07,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855644609] [2022-04-06 10:32:07,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855644609] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135251452] [2022-04-06 10:32:07,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:32:07,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:07,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:07,683 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:07,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 10:32:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:32:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:32:08,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:32:08,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135251452] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:08,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:08,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 37 [2022-04-06 10:32:08,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721033609] [2022-04-06 10:32:08,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:08,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 10:32:08,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:08,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 10:32:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:32:08,265 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:10,038 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-04-06 10:32:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:32:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-06 10:32:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:10,041 INFO L225 Difference]: With dead ends: 460 [2022-04-06 10:32:10,041 INFO L226 Difference]: Without dead ends: 454 [2022-04-06 10:32:10,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=4061, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 10:32:10,043 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 187 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:10,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 238 Invalid, 3973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:32:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-04-06 10:32:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 398. [2022-04-06 10:32:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 373 states have internal predecessors, (397), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-04-06 10:32:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-04-06 10:32:10,120 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 49 [2022-04-06 10:32:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:10,120 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-04-06 10:32:10,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-04-06 10:32:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 10:32:10,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:10,124 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2022-04-06 10:32:10,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 10:32:10,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 10:32:10,339 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2087113895, now seen corresponding path program 44 times [2022-04-06 10:32:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:10,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453792007] [2022-04-06 10:32:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:10,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:10,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:32:10,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453792007] [2022-04-06 10:32:10,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453792007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226714072] [2022-04-06 10:32:10,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:32:10,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:10,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:10,757 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:10,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 10:32:10,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:32:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 10:32:10,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:32:11,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:32:11,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226714072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:11,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:11,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 37 [2022-04-06 10:32:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235013414] [2022-04-06 10:32:11,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:11,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 10:32:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 10:32:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:32:11,433 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:12,895 INFO L93 Difference]: Finished difference Result 404 states and 459 transitions. [2022-04-06 10:32:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:32:12,895 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-06 10:32:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:12,896 INFO L225 Difference]: With dead ends: 404 [2022-04-06 10:32:12,897 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 10:32:12,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 10:32:12,899 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3209 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:12,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 221 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3209 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 10:32:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 10:32:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-04-06 10:32:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-04-06 10:32:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2022-04-06 10:32:12,995 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 49 [2022-04-06 10:32:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:12,995 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2022-04-06 10:32:12,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2022-04-06 10:32:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 10:32:12,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:12,999 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:13,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 10:32:13,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:13,215 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1245370818, now seen corresponding path program 45 times [2022-04-06 10:32:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:13,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68910297] [2022-04-06 10:32:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:13,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:13,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:32:13,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:13,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68910297] [2022-04-06 10:32:13,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68910297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:13,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817244453] [2022-04-06 10:32:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:32:13,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:13,583 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:13,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 10:32:13,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 10:32:13,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 10:32:13,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:32:14,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:32:14,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817244453] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:14,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:14,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 37 [2022-04-06 10:32:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595080010] [2022-04-06 10:32:14,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:14,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 10:32:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 10:32:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:32:14,276 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:15,389 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2022-04-06 10:32:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 10:32:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-06 10:32:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:15,390 INFO L225 Difference]: With dead ends: 388 [2022-04-06 10:32:15,390 INFO L226 Difference]: Without dead ends: 364 [2022-04-06 10:32:15,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 10:32:15,392 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:15,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 191 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:32:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-04-06 10:32:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-04-06 10:32:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 313 states have (on average 1.1661341853035143) internal successors, (365), 341 states have internal predecessors, (365), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-04-06 10:32:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2022-04-06 10:32:15,483 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 49 [2022-04-06 10:32:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:15,483 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2022-04-06 10:32:15,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2022-04-06 10:32:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 10:32:15,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:15,485 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:15,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 10:32:15,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 10:32:15,686 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 623868167, now seen corresponding path program 46 times [2022-04-06 10:32:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:15,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036310604] [2022-04-06 10:32:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:15,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:15,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:32:16,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:16,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036310604] [2022-04-06 10:32:16,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036310604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:16,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945379583] [2022-04-06 10:32:16,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:32:16,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:16,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:16,011 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 10:32:16,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:32:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 10:32:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:32:16,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:32:16,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945379583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:16,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:16,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 37 [2022-04-06 10:32:16,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592704611] [2022-04-06 10:32:16,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:16,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 10:32:16,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 10:32:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:32:16,834 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:17,617 INFO L93 Difference]: Finished difference Result 382 states and 437 transitions. [2022-04-06 10:32:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 10:32:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-06 10:32:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:17,619 INFO L225 Difference]: With dead ends: 382 [2022-04-06 10:32:17,619 INFO L226 Difference]: Without dead ends: 376 [2022-04-06 10:32:17,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 10:32:17,620 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:17,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:32:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-04-06 10:32:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2022-04-06 10:32:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 320 states have (on average 1.16875) internal successors, (374), 350 states have internal predecessors, (374), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-04-06 10:32:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 429 transitions. [2022-04-06 10:32:17,687 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 429 transitions. Word has length 49 [2022-04-06 10:32:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:17,687 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 429 transitions. [2022-04-06 10:32:17,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 429 transitions. [2022-04-06 10:32:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 10:32:17,689 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:17,689 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 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] [2022-04-06 10:32:17,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:17,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:17,890 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1933296099, now seen corresponding path program 47 times [2022-04-06 10:32:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:17,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149484686] [2022-04-06 10:32:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:17,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:17,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:18,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149484686] [2022-04-06 10:32:18,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149484686] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745460878] [2022-04-06 10:32:18,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:32:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:18,211 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:18,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 10:32:18,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:32:18,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 10:32:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:18,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:19,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745460878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:19,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:19,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-04-06 10:32:19,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043974269] [2022-04-06 10:32:19,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:19,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:32:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:32:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:32:19,541 INFO L87 Difference]: Start difference. First operand 374 states and 429 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:22,288 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2022-04-06 10:32:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 10:32:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 10:32:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:22,293 INFO L225 Difference]: With dead ends: 442 [2022-04-06 10:32:22,293 INFO L226 Difference]: Without dead ends: 428 [2022-04-06 10:32:22,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 10:32:22,296 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 843 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:22,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 236 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 10:32:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-04-06 10:32:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2022-04-06 10:32:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 393 states have internal predecessors, (419), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2022-04-06 10:32:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2022-04-06 10:32:22,395 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 50 [2022-04-06 10:32:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:22,395 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2022-04-06 10:32:22,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2022-04-06 10:32:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 10:32:22,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:22,398 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 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] [2022-04-06 10:32:22,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 10:32:22,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:22,599 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash 30934931, now seen corresponding path program 48 times [2022-04-06 10:32:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:22,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822170100] [2022-04-06 10:32:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:22,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:22,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:22,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822170100] [2022-04-06 10:32:22,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822170100] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:22,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493943134] [2022-04-06 10:32:22,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:32:22,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:22,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:22,978 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:22,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 10:32:23,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 10:32:23,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 10:32:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:23,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:24,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493943134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:24,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:24,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-04-06 10:32:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974603710] [2022-04-06 10:32:24,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:24,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:32:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:32:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:32:24,381 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:27,048 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2022-04-06 10:32:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 10:32:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 10:32:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:27,059 INFO L225 Difference]: With dead ends: 434 [2022-04-06 10:32:27,059 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 10:32:27,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 10:32:27,061 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 872 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3502 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 3589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:27,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 228 Invalid, 3589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3502 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 10:32:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 10:32:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-04-06 10:32:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 360 states have (on average 1.1666666666666667) internal successors, (420), 394 states have internal predecessors, (420), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 10:32:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 480 transitions. [2022-04-06 10:32:27,144 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 480 transitions. Word has length 50 [2022-04-06 10:32:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:27,144 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 480 transitions. [2022-04-06 10:32:27,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 480 transitions. [2022-04-06 10:32:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 10:32:27,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:27,147 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:27,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 10:32:27,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-06 10:32:27,348 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2075396918, now seen corresponding path program 49 times [2022-04-06 10:32:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:27,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705036907] [2022-04-06 10:32:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:27,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:27,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:27,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:27,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:27,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705036907] [2022-04-06 10:32:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705036907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:27,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877610559] [2022-04-06 10:32:27,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:32:27,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:27,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:27,444 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:27,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 10:32:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:27,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 10:32:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:27,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:27,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877610559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:27,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:27,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-04-06 10:32:27,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103982064] [2022-04-06 10:32:27,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:27,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 10:32:27,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:27,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 10:32:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 10:32:27,695 INFO L87 Difference]: Start difference. First operand 420 states and 480 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:32:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:28,142 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2022-04-06 10:32:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 10:32:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-04-06 10:32:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:28,145 INFO L225 Difference]: With dead ends: 540 [2022-04-06 10:32:28,145 INFO L226 Difference]: Without dead ends: 502 [2022-04-06 10:32:28,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 10:32:28,149 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:28,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 81 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:32:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-06 10:32:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2022-04-06 10:32:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.1650717703349283) internal successors, (487), 452 states have internal predecessors, (487), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 10:32:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 547 transitions. [2022-04-06 10:32:28,272 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 547 transitions. Word has length 50 [2022-04-06 10:32:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:28,272 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 547 transitions. [2022-04-06 10:32:28,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:32:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 547 transitions. [2022-04-06 10:32:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 10:32:28,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:28,275 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:28,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-04-06 10:32:28,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 10:32:28,475 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1468811041, now seen corresponding path program 50 times [2022-04-06 10:32:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:28,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903158177] [2022-04-06 10:32:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:28,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:28,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903158177] [2022-04-06 10:32:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903158177] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396771375] [2022-04-06 10:32:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:32:28,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:28,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:28,562 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:28,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 10:32:28,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:32:28,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 10:32:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:28,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:32:28,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396771375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:28,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:28,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-04-06 10:32:28,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945023257] [2022-04-06 10:32:28,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:28,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 10:32:28,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 10:32:28,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 10:32:28,814 INFO L87 Difference]: Start difference. First operand 478 states and 547 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:29,314 INFO L93 Difference]: Finished difference Result 857 states and 980 transitions. [2022-04-06 10:32:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 10:32:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-04-06 10:32:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:29,319 INFO L225 Difference]: With dead ends: 857 [2022-04-06 10:32:29,319 INFO L226 Difference]: Without dead ends: 560 [2022-04-06 10:32:29,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 10:32:29,323 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:29,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 81 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:32:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-04-06 10:32:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2022-04-06 10:32:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 10:32:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 614 transitions. [2022-04-06 10:32:29,502 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 614 transitions. Word has length 50 [2022-04-06 10:32:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:29,502 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 614 transitions. [2022-04-06 10:32:29,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 614 transitions. [2022-04-06 10:32:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 10:32:29,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:29,506 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 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] [2022-04-06 10:32:29,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:29,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 10:32:29,722 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1466609972, now seen corresponding path program 51 times [2022-04-06 10:32:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:29,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591257206] [2022-04-06 10:32:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:29,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:29,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:29,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:32:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591257206] [2022-04-06 10:32:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591257206] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618980014] [2022-04-06 10:32:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:32:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:30,216 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:30,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 10:32:30,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 10:32:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:32:30,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:32:30,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:32:30,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618980014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:30,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:30,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 39 [2022-04-06 10:32:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350800409] [2022-04-06 10:32:30,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:30,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 10:32:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 10:32:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:32:30,871 INFO L87 Difference]: Start difference. First operand 536 states and 614 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:33,129 INFO L93 Difference]: Finished difference Result 628 states and 719 transitions. [2022-04-06 10:32:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:32:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-06 10:32:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:33,133 INFO L225 Difference]: With dead ends: 628 [2022-04-06 10:32:33,133 INFO L226 Difference]: Without dead ends: 622 [2022-04-06 10:32:33,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=4589, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 10:32:33,136 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 211 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5210 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 5258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 5210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:33,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 275 Invalid, 5258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 5210 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 10:32:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-04-06 10:32:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 552. [2022-04-06 10:32:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 489 states have (on average 1.16359918200409) internal successors, (569), 525 states have internal predecessors, (569), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-04-06 10:32:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-04-06 10:32:33,272 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 51 [2022-04-06 10:32:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:33,272 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-04-06 10:32:33,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-04-06 10:32:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 10:32:33,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:33,275 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2022-04-06 10:32:33,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:33,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:33,476 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2017377143, now seen corresponding path program 52 times [2022-04-06 10:32:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:33,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285117803] [2022-04-06 10:32:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:33,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:33,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:33,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:32:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:33,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285117803] [2022-04-06 10:32:33,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285117803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640536132] [2022-04-06 10:32:33,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:32:33,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:33,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:33,956 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:33,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 10:32:34,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:32:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:32:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:32:34,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:32:34,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640536132] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:34,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:34,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 39 [2022-04-06 10:32:34,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845566070] [2022-04-06 10:32:34,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:34,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 10:32:34,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 10:32:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:32:34,749 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:36,514 INFO L93 Difference]: Finished difference Result 558 states and 638 transitions. [2022-04-06 10:32:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:32:36,515 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-06 10:32:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:36,516 INFO L225 Difference]: With dead ends: 558 [2022-04-06 10:32:36,517 INFO L226 Difference]: Without dead ends: 536 [2022-04-06 10:32:36,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 10:32:36,518 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:36,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 235 Invalid, 3738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3702 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 10:32:36,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-04-06 10:32:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-04-06 10:32:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-06 10:32:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2022-04-06 10:32:36,639 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 51 [2022-04-06 10:32:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:36,639 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2022-04-06 10:32:36,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2022-04-06 10:32:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 10:32:36,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:36,643 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:36,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 10:32:36,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 10:32:36,859 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1775857708, now seen corresponding path program 53 times [2022-04-06 10:32:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072803797] [2022-04-06 10:32:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:36,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:36,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:37,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:32:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072803797] [2022-04-06 10:32:37,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072803797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14212454] [2022-04-06 10:32:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:32:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:37,284 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 10:32:37,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-06 10:32:37,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 10:32:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:32:37,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:32:38,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14212454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:38,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:38,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 39 [2022-04-06 10:32:38,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741792464] [2022-04-06 10:32:38,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:38,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 10:32:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:38,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 10:32:38,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:32:38,030 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:39,388 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2022-04-06 10:32:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:32:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-06 10:32:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:39,390 INFO L225 Difference]: With dead ends: 542 [2022-04-06 10:32:39,390 INFO L226 Difference]: Without dead ends: 518 [2022-04-06 10:32:39,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=4045, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 10:32:39,392 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:39,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 200 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 10:32:39,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-04-06 10:32:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-04-06 10:32:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.1648590021691974) internal successors, (537), 493 states have internal predecessors, (537), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2022-04-06 10:32:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 595 transitions. [2022-04-06 10:32:39,545 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 595 transitions. Word has length 51 [2022-04-06 10:32:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:39,545 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 595 transitions. [2022-04-06 10:32:39,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 595 transitions. [2022-04-06 10:32:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 10:32:39,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:39,548 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:39,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 10:32:39,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:39,749 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1844811183, now seen corresponding path program 54 times [2022-04-06 10:32:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:39,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248669015] [2022-04-06 10:32:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:39,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:39,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:39,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:39,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 10:32:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 10:32:40,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248669015] [2022-04-06 10:32:40,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248669015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381134123] [2022-04-06 10:32:40,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:32:40,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:40,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:40,008 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:40,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 10:32:40,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:32:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 10:32:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 10:32:40,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 10:32:40,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381134123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:40,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:40,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-04-06 10:32:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16293516] [2022-04-06 10:32:40,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:40,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 10:32:40,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 10:32:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:32:40,829 INFO L87 Difference]: Start difference. First operand 518 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:42,164 INFO L93 Difference]: Finished difference Result 590 states and 681 transitions. [2022-04-06 10:32:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 10:32:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 10:32:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:42,168 INFO L225 Difference]: With dead ends: 590 [2022-04-06 10:32:42,169 INFO L226 Difference]: Without dead ends: 573 [2022-04-06 10:32:42,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 10:32:42,171 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:42,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 163 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:32:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-06 10:32:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2022-04-06 10:32:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 490 states have (on average 1.153061224489796) internal successors, (565), 536 states have internal predecessors, (565), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-04-06 10:32:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 651 transitions. [2022-04-06 10:32:42,306 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 651 transitions. Word has length 51 [2022-04-06 10:32:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:42,306 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 651 transitions. [2022-04-06 10:32:42,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 651 transitions. [2022-04-06 10:32:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 10:32:42,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:42,310 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:32:42,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 10:32:42,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:42,510 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -58898921, now seen corresponding path program 55 times [2022-04-06 10:32:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188805704] [2022-04-06 10:32:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:42,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:42,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:32:42,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188805704] [2022-04-06 10:32:42,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188805704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248424576] [2022-04-06 10:32:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:32:42,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:42,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:42,855 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:42,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 10:32:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 10:32:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:32:43,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:32:43,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248424576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:43,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:43,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2022-04-06 10:32:43,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601379268] [2022-04-06 10:32:43,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:43,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 10:32:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 10:32:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:32:43,622 INFO L87 Difference]: Start difference. First operand 568 states and 651 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:44,756 INFO L93 Difference]: Finished difference Result 586 states and 673 transitions. [2022-04-06 10:32:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 10:32:44,756 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-04-06 10:32:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:44,759 INFO L225 Difference]: With dead ends: 586 [2022-04-06 10:32:44,760 INFO L226 Difference]: Without dead ends: 569 [2022-04-06 10:32:44,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 10:32:44,762 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:44,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 193 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:32:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-04-06 10:32:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2022-04-06 10:32:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 486 states have (on average 1.1563786008230452) internal successors, (562), 532 states have internal predecessors, (562), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-04-06 10:32:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 648 transitions. [2022-04-06 10:32:44,902 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 648 transitions. Word has length 51 [2022-04-06 10:32:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:44,902 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 648 transitions. [2022-04-06 10:32:44,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:32:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 648 transitions. [2022-04-06 10:32:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 10:32:44,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:44,907 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:44,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:45,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:45,132 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash -269481222, now seen corresponding path program 56 times [2022-04-06 10:32:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:45,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362915899] [2022-04-06 10:32:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:45,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:45,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:45,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:32:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 10:32:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:45,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362915899] [2022-04-06 10:32:45,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362915899] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:45,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982952064] [2022-04-06 10:32:45,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:32:45,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:45,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:45,384 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:45,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 10:32:45,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:32:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 10:32:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 10:32:45,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 10:32:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982952064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:46,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:46,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-04-06 10:32:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723810522] [2022-04-06 10:32:46,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:46,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 10:32:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 10:32:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 10:32:46,327 INFO L87 Difference]: Start difference. First operand 564 states and 648 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:47,714 INFO L93 Difference]: Finished difference Result 578 states and 661 transitions. [2022-04-06 10:32:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 10:32:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 10:32:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:47,717 INFO L225 Difference]: With dead ends: 578 [2022-04-06 10:32:47,717 INFO L226 Difference]: Without dead ends: 554 [2022-04-06 10:32:47,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 10:32:47,719 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 388 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:47,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 176 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:32:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-04-06 10:32:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-04-06 10:32:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 474 states have (on average 1.1561181434599157) internal successors, (548), 520 states have internal predecessors, (548), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2022-04-06 10:32:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 628 transitions. [2022-04-06 10:32:47,848 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 628 transitions. Word has length 51 [2022-04-06 10:32:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:47,849 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 628 transitions. [2022-04-06 10:32:47,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 628 transitions. [2022-04-06 10:32:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 10:32:47,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:47,852 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 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] [2022-04-06 10:32:47,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 10:32:48,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:48,052 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash -645861709, now seen corresponding path program 57 times [2022-04-06 10:32:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531334067] [2022-04-06 10:32:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:48,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:48,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531334067] [2022-04-06 10:32:48,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531334067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096096626] [2022-04-06 10:32:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:32:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:48,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:48,409 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:48,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 10:32:48,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 10:32:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 10:32:48,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:49,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:49,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096096626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:49,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:49,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-04-06 10:32:49,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857832721] [2022-04-06 10:32:49,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:49,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 10:32:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 10:32:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 10:32:49,942 INFO L87 Difference]: Start difference. First operand 552 states and 628 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:53,132 INFO L93 Difference]: Finished difference Result 642 states and 735 transitions. [2022-04-06 10:32:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 10:32:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 10:32:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:53,137 INFO L225 Difference]: With dead ends: 642 [2022-04-06 10:32:53,137 INFO L226 Difference]: Without dead ends: 628 [2022-04-06 10:32:53,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 10:32:53,141 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 1094 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3995 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:53,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 246 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3995 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 10:32:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-04-06 10:32:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2022-04-06 10:32:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 532 states have (on average 1.1541353383458646) internal successors, (614), 584 states have internal predecessors, (614), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2022-04-06 10:32:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 706 transitions. [2022-04-06 10:32:53,313 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 706 transitions. Word has length 52 [2022-04-06 10:32:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:53,313 INFO L478 AbstractCegarLoop]: Abstraction has 619 states and 706 transitions. [2022-04-06 10:32:53,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 706 transitions. [2022-04-06 10:32:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 10:32:53,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:53,318 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 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] [2022-04-06 10:32:53,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:53,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 10:32:53,531 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:53,532 INFO L85 PathProgramCache]: Analyzing trace with hash 115758077, now seen corresponding path program 58 times [2022-04-06 10:32:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:53,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485682752] [2022-04-06 10:32:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:53,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:53,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:32:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:53,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485682752] [2022-04-06 10:32:53,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485682752] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066124520] [2022-04-06 10:32:53,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:32:53,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:53,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:53,899 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:53,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 10:32:53,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:32:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:53,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 10:32:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:32:55,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066124520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:55,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:55,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-04-06 10:32:55,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88893312] [2022-04-06 10:32:55,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:55,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 10:32:55,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 10:32:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 10:32:55,480 INFO L87 Difference]: Start difference. First operand 619 states and 706 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:59,005 INFO L93 Difference]: Finished difference Result 634 states and 721 transitions. [2022-04-06 10:32:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 10:32:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 10:32:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:59,009 INFO L225 Difference]: With dead ends: 634 [2022-04-06 10:32:59,009 INFO L226 Difference]: Without dead ends: 622 [2022-04-06 10:32:59,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 10:32:59,013 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 1040 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5029 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 5029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:59,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 278 Invalid, 5135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 5029 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 10:32:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-04-06 10:32:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-04-06 10:32:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 533 states have (on average 1.1538461538461537) internal successors, (615), 585 states have internal predecessors, (615), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-06 10:32:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 703 transitions. [2022-04-06 10:32:59,186 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 703 transitions. Word has length 52 [2022-04-06 10:32:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:59,186 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 703 transitions. [2022-04-06 10:32:59,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:32:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 703 transitions. [2022-04-06 10:32:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 10:32:59,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:59,193 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:59,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:59,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 10:32:59,417 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash -502641418, now seen corresponding path program 59 times [2022-04-06 10:32:59,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:59,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631482607] [2022-04-06 10:32:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:59,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:59,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:59,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:32:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:59,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 10:32:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:32:59,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631482607] [2022-04-06 10:32:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631482607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:32:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817971078] [2022-04-06 10:32:59,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:32:59,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:59,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:59,498 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:59,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 10:32:59,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 10:32:59,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 10:32:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:32:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:32:59,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817971078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:59,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:32:59,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-04-06 10:32:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678443153] [2022-04-06 10:32:59,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:59,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 10:32:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 10:32:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-06 10:32:59,767 INFO L87 Difference]: Start difference. First operand 620 states and 703 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:00,254 INFO L93 Difference]: Finished difference Result 944 states and 1054 transitions. [2022-04-06 10:33:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 10:33:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-04-06 10:33:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:00,260 INFO L225 Difference]: With dead ends: 944 [2022-04-06 10:33:00,260 INFO L226 Difference]: Without dead ends: 617 [2022-04-06 10:33:00,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 10:33:00,265 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:00,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:33:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-04-06 10:33:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2022-04-06 10:33:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 528 states have (on average 1.1477272727272727) internal successors, (606), 576 states have internal predecessors, (606), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-04-06 10:33:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 686 transitions. [2022-04-06 10:33:00,494 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 686 transitions. Word has length 52 [2022-04-06 10:33:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:00,494 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 686 transitions. [2022-04-06 10:33:00,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 686 transitions. [2022-04-06 10:33:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 10:33:00,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:00,499 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:33:00,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 10:33:00,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 10:33:00,711 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -753408037, now seen corresponding path program 60 times [2022-04-06 10:33:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:00,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192951271] [2022-04-06 10:33:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:00,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:00,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192951271] [2022-04-06 10:33:00,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192951271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45649746] [2022-04-06 10:33:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:33:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:00,792 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 10:33:00,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:33:00,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:00,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 10:33:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:00,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:01,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45649746] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:01,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:01,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-04-06 10:33:01,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531773226] [2022-04-06 10:33:01,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:01,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 10:33:01,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:01,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 10:33:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-06 10:33:01,047 INFO L87 Difference]: Start difference. First operand 609 states and 686 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:33:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:01,534 INFO L93 Difference]: Finished difference Result 651 states and 736 transitions. [2022-04-06 10:33:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 10:33:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-04-06 10:33:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:01,536 INFO L225 Difference]: With dead ends: 651 [2022-04-06 10:33:01,536 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 10:33:01,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 10:33:01,539 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:01,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 85 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:33:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 10:33:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-04-06 10:33:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-04-06 10:33:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 695 transitions. [2022-04-06 10:33:01,703 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 695 transitions. Word has length 52 [2022-04-06 10:33:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:01,704 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 695 transitions. [2022-04-06 10:33:01,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:33:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 695 transitions. [2022-04-06 10:33:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 10:33:01,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:01,709 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 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] [2022-04-06 10:33:01,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 10:33:01,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:01,933 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1162907554, now seen corresponding path program 61 times [2022-04-06 10:33:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:01,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69729811] [2022-04-06 10:33:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:02,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:33:02,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69729811] [2022-04-06 10:33:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69729811] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947852324] [2022-04-06 10:33:02,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:33:02,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:02,503 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:02,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 10:33:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:33:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:33:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:33:03,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947852324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:03,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:03,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 41 [2022-04-06 10:33:03,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047839481] [2022-04-06 10:33:03,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:03,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 10:33:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 10:33:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 10:33:03,197 INFO L87 Difference]: Start difference. First operand 618 states and 695 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:05,623 INFO L93 Difference]: Finished difference Result 718 states and 808 transitions. [2022-04-06 10:33:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:33:05,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-06 10:33:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:05,627 INFO L225 Difference]: With dead ends: 718 [2022-04-06 10:33:05,627 INFO L226 Difference]: Without dead ends: 712 [2022-04-06 10:33:05,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=5149, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 10:33:05,630 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 230 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 5745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:05,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 283 Invalid, 5745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 10:33:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-04-06 10:33:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 634. [2022-04-06 10:33:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 600 states have internal predecessors, (630), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2022-04-06 10:33:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 714 transitions. [2022-04-06 10:33:05,798 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 714 transitions. Word has length 53 [2022-04-06 10:33:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:05,798 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 714 transitions. [2022-04-06 10:33:05,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 714 transitions. [2022-04-06 10:33:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 10:33:05,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:05,802 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 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, 1, 1, 1, 1] [2022-04-06 10:33:05,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 10:33:06,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:06,002 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1647072793, now seen corresponding path program 62 times [2022-04-06 10:33:06,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:06,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161190021] [2022-04-06 10:33:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:06,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:06,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:33:06,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161190021] [2022-04-06 10:33:06,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161190021] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781217285] [2022-04-06 10:33:06,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:33:06,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:06,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:06,462 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:06,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 10:33:06,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:33:06,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:33:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:33:06,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:33:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781217285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:07,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:07,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 41 [2022-04-06 10:33:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212617069] [2022-04-06 10:33:07,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:07,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 10:33:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 10:33:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 10:33:07,204 INFO L87 Difference]: Start difference. First operand 634 states and 714 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:09,270 INFO L93 Difference]: Finished difference Result 640 states and 719 transitions. [2022-04-06 10:33:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:33:09,270 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-06 10:33:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:09,273 INFO L225 Difference]: With dead ends: 640 [2022-04-06 10:33:09,273 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 10:33:09,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=4857, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 10:33:09,277 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 163 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4535 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:09,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 256 Invalid, 4571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4535 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 10:33:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 10:33:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-04-06 10:33:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2022-04-06 10:33:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 696 transitions. [2022-04-06 10:33:09,481 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 696 transitions. Word has length 53 [2022-04-06 10:33:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:09,481 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 696 transitions. [2022-04-06 10:33:09,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 696 transitions. [2022-04-06 10:33:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 10:33:09,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:09,485 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:33:09,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 10:33:09,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:09,685 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1800218814, now seen corresponding path program 63 times [2022-04-06 10:33:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185565579] [2022-04-06 10:33:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:09,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:09,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:09,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:33:10,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185565579] [2022-04-06 10:33:10,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185565579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136052] [2022-04-06 10:33:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:33:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:10,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:10,102 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:10,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 10:33:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 10:33:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:33:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:33:10,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:33:10,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136052] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:10,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:10,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 41 [2022-04-06 10:33:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506390069] [2022-04-06 10:33:10,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:10,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 10:33:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 10:33:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 10:33:10,880 INFO L87 Difference]: Start difference. First operand 618 states and 696 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:12,706 INFO L93 Difference]: Finished difference Result 624 states and 701 transitions. [2022-04-06 10:33:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:33:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-06 10:33:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:12,709 INFO L225 Difference]: With dead ends: 624 [2022-04-06 10:33:12,709 INFO L226 Difference]: Without dead ends: 600 [2022-04-06 10:33:12,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=4573, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 10:33:12,712 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 126 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3949 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:12,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 251 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3949 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:33:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-04-06 10:33:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-04-06 10:33:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 522 states have (on average 1.1455938697318007) internal successors, (598), 568 states have internal predecessors, (598), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2022-04-06 10:33:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 676 transitions. [2022-04-06 10:33:12,871 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 676 transitions. Word has length 53 [2022-04-06 10:33:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:12,871 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 676 transitions. [2022-04-06 10:33:12,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 676 transitions. [2022-04-06 10:33:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 10:33:12,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:12,874 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, 1] [2022-04-06 10:33:12,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 10:33:13,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:13,075 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:13,075 INFO L85 PathProgramCache]: Analyzing trace with hash -279022009, now seen corresponding path program 64 times [2022-04-06 10:33:13,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:13,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143155786] [2022-04-06 10:33:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:13,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:13,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:13,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:33:13,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:13,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143155786] [2022-04-06 10:33:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143155786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:13,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010474941] [2022-04-06 10:33:13,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:33:13,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:13,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:13,542 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:13,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 10:33:13,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:33:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 10:33:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:33:14,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:33:14,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010474941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:14,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:14,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2022-04-06 10:33:14,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689056255] [2022-04-06 10:33:14,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:14,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 10:33:14,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 10:33:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 10:33:14,409 INFO L87 Difference]: Start difference. First operand 600 states and 676 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:15,798 INFO L93 Difference]: Finished difference Result 606 states and 681 transitions. [2022-04-06 10:33:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:33:15,798 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-06 10:33:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:15,800 INFO L225 Difference]: With dead ends: 606 [2022-04-06 10:33:15,800 INFO L226 Difference]: Without dead ends: 580 [2022-04-06 10:33:15,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=4297, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 10:33:15,803 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:15,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 216 Invalid, 2694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 10:33:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-06 10:33:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-04-06 10:33:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 549 states have internal predecessors, (579), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2022-04-06 10:33:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 654 transitions. [2022-04-06 10:33:15,954 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 654 transitions. Word has length 53 [2022-04-06 10:33:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:15,954 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 654 transitions. [2022-04-06 10:33:15,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 654 transitions. [2022-04-06 10:33:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 10:33:15,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:15,957 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2022-04-06 10:33:15,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 10:33:16,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:16,157 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1965459742, now seen corresponding path program 65 times [2022-04-06 10:33:16,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:16,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786616707] [2022-04-06 10:33:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:16,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:33:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786616707] [2022-04-06 10:33:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786616707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841520244] [2022-04-06 10:33:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:33:16,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:16,496 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:16,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 10:33:16,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 10:33:16,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:16,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 10:33:16,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:33:17,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:33:17,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841520244] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:17,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:17,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-04-06 10:33:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238727263] [2022-04-06 10:33:17,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:17,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 10:33:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 10:33:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 10:33:17,341 INFO L87 Difference]: Start difference. First operand 580 states and 654 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:18,299 INFO L93 Difference]: Finished difference Result 598 states and 675 transitions. [2022-04-06 10:33:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 10:33:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-04-06 10:33:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:18,303 INFO L225 Difference]: With dead ends: 598 [2022-04-06 10:33:18,303 INFO L226 Difference]: Without dead ends: 592 [2022-04-06 10:33:18,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 10:33:18,305 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:18,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 161 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:33:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-04-06 10:33:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2022-04-06 10:33:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 512 states have (on average 1.1484375) internal successors, (588), 558 states have internal predecessors, (588), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-04-06 10:33:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 667 transitions. [2022-04-06 10:33:18,467 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 667 transitions. Word has length 53 [2022-04-06 10:33:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:18,467 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 667 transitions. [2022-04-06 10:33:18,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 667 transitions. [2022-04-06 10:33:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 10:33:18,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:18,470 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 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] [2022-04-06 10:33:18,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 10:33:18,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-04-06 10:33:18,670 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -735197027, now seen corresponding path program 66 times [2022-04-06 10:33:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102874648] [2022-04-06 10:33:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:18,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:33:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102874648] [2022-04-06 10:33:19,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102874648] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956364039] [2022-04-06 10:33:19,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:33:19,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:19,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:19,074 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:19,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 10:33:19,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 10:33:19,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:19,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 10:33:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:33:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:33:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956364039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:20,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:20,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-04-06 10:33:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633186185] [2022-04-06 10:33:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:20,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 10:33:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 10:33:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 10:33:20,845 INFO L87 Difference]: Start difference. First operand 590 states and 667 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:33:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:25,315 INFO L93 Difference]: Finished difference Result 682 states and 776 transitions. [2022-04-06 10:33:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 10:33:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-06 10:33:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:25,320 INFO L225 Difference]: With dead ends: 682 [2022-04-06 10:33:25,320 INFO L226 Difference]: Without dead ends: 668 [2022-04-06 10:33:25,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 10:33:25,323 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 1206 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6616 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 6760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:25,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 326 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6616 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 10:33:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-04-06 10:33:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 659. [2022-04-06 10:33:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 572 states have (on average 1.1468531468531469) internal successors, (656), 624 states have internal predecessors, (656), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2022-04-06 10:33:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 747 transitions. [2022-04-06 10:33:25,600 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 747 transitions. Word has length 54 [2022-04-06 10:33:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:25,600 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 747 transitions. [2022-04-06 10:33:25,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:33:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 747 transitions. [2022-04-06 10:33:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 10:33:25,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:25,606 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 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] [2022-04-06 10:33:25,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 10:33:25,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-04-06 10:33:25,819 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1400179859, now seen corresponding path program 67 times [2022-04-06 10:33:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:25,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672307782] [2022-04-06 10:33:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:33:26,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:26,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672307782] [2022-04-06 10:33:26,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672307782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:26,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844006676] [2022-04-06 10:33:26,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:33:26,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:26,212 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:26,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 10:33:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 10:33:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:33:27,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:33:28,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844006676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:28,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:28,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-04-06 10:33:28,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824660366] [2022-04-06 10:33:28,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:28,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 10:33:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 10:33:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 10:33:28,008 INFO L87 Difference]: Start difference. First operand 659 states and 747 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:33:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:32,607 INFO L93 Difference]: Finished difference Result 674 states and 762 transitions. [2022-04-06 10:33:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 10:33:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-04-06 10:33:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:32,610 INFO L225 Difference]: With dead ends: 674 [2022-04-06 10:33:32,610 INFO L226 Difference]: Without dead ends: 662 [2022-04-06 10:33:32,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 10:33:32,613 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 1188 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7105 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 7232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 7105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:32,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 338 Invalid, 7232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 7105 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 10:33:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-04-06 10:33:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 660. [2022-04-06 10:33:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 573 states have (on average 1.1465968586387434) internal successors, (657), 625 states have internal predecessors, (657), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-06 10:33:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 744 transitions. [2022-04-06 10:33:32,804 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 744 transitions. Word has length 54 [2022-04-06 10:33:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:32,804 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 744 transitions. [2022-04-06 10:33:32,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:33:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 744 transitions. [2022-04-06 10:33:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 10:33:32,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:32,808 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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] [2022-04-06 10:33:32,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 10:33:33,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 10:33:33,008 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:33,009 INFO L85 PathProgramCache]: Analyzing trace with hash -884356933, now seen corresponding path program 68 times [2022-04-06 10:33:33,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:33,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131630386] [2022-04-06 10:33:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:33,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:33,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:33,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:33,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:33,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131630386] [2022-04-06 10:33:33,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131630386] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585899459] [2022-04-06 10:33:33,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:33:33,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:33,132 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:33,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 10:33:33,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:33:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 10:33:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:33,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585899459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:33,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:33,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-04-06 10:33:33,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107186943] [2022-04-06 10:33:33,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:33,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 10:33:33,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 10:33:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-06 10:33:33,467 INFO L87 Difference]: Start difference. First operand 660 states and 744 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:33:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:34,157 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2022-04-06 10:33:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:33:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-04-06 10:33:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:34,161 INFO L225 Difference]: With dead ends: 818 [2022-04-06 10:33:34,161 INFO L226 Difference]: Without dead ends: 772 [2022-04-06 10:33:34,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 10:33:34,175 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:34,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 80 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:33:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-04-06 10:33:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2022-04-06 10:33:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 655 states have (on average 1.1450381679389312) internal successors, (750), 707 states have internal predecessors, (750), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-06 10:33:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 837 transitions. [2022-04-06 10:33:34,399 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 837 transitions. Word has length 54 [2022-04-06 10:33:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:34,399 INFO L478 AbstractCegarLoop]: Abstraction has 742 states and 837 transitions. [2022-04-06 10:33:34,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:33:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 837 transitions. [2022-04-06 10:33:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 10:33:34,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:34,404 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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] [2022-04-06 10:33:34,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 10:33:34,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 10:33:34,604 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash -68187530, now seen corresponding path program 69 times [2022-04-06 10:33:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:34,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915344079] [2022-04-06 10:33:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:34,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:34,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:34,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915344079] [2022-04-06 10:33:34,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915344079] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:34,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4283848] [2022-04-06 10:33:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:33:34,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:34,710 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:34,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 10:33:34,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 10:33:34,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 10:33:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:34,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 10:33:35,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4283848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:35,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:35,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-04-06 10:33:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399617401] [2022-04-06 10:33:35,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:35,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 10:33:35,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 10:33:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-06 10:33:35,020 INFO L87 Difference]: Start difference. First operand 742 states and 837 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:35,706 INFO L93 Difference]: Finished difference Result 1298 states and 1460 transitions. [2022-04-06 10:33:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:33:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-04-06 10:33:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:35,714 INFO L225 Difference]: With dead ends: 1298 [2022-04-06 10:33:35,715 INFO L226 Difference]: Without dead ends: 854 [2022-04-06 10:33:35,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 10:33:35,719 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 176 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:35,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 80 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:33:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-04-06 10:33:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 824. [2022-04-06 10:33:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-04-06 10:33:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 930 transitions. [2022-04-06 10:33:35,999 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 930 transitions. Word has length 54 [2022-04-06 10:33:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:35,999 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 930 transitions. [2022-04-06 10:33:35,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 930 transitions. [2022-04-06 10:33:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:36,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:36,005 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-04-06 10:33:36,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 10:33:36,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:36,205 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1969690164, now seen corresponding path program 70 times [2022-04-06 10:33:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038902005] [2022-04-06 10:33:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:36,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:36,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:33:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038902005] [2022-04-06 10:33:36,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038902005] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753757369] [2022-04-06 10:33:36,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:33:36,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:36,783 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:36,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 10:33:36,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:33:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:36,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:33:36,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:33:37,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:33:37,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753757369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:37,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:37,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 43 [2022-04-06 10:33:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211688051] [2022-04-06 10:33:37,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:37,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:33:37,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:33:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:33:37,441 INFO L87 Difference]: Start difference. First operand 824 states and 930 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:40,194 INFO L93 Difference]: Finished difference Result 940 states and 1061 transitions. [2022-04-06 10:33:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:33:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-06 10:33:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:40,200 INFO L225 Difference]: With dead ends: 940 [2022-04-06 10:33:40,200 INFO L226 Difference]: Without dead ends: 934 [2022-04-06 10:33:40,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=265, Invalid=5741, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 10:33:40,204 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 254 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6136 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 6136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:40,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 290 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 6136 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 10:33:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-06 10:33:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 840. [2022-04-06 10:33:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 750 states have (on average 1.144) internal successors, (858), 804 states have internal predecessors, (858), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2022-04-06 10:33:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 949 transitions. [2022-04-06 10:33:40,491 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 949 transitions. Word has length 55 [2022-04-06 10:33:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:40,491 INFO L478 AbstractCegarLoop]: Abstraction has 840 states and 949 transitions. [2022-04-06 10:33:40,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 949 transitions. [2022-04-06 10:33:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:40,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:40,496 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1, 1] [2022-04-06 10:33:40,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 10:33:40,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:40,697 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash -180702025, now seen corresponding path program 71 times [2022-04-06 10:33:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568388286] [2022-04-06 10:33:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:40,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:40,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:33:41,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:41,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568388286] [2022-04-06 10:33:41,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568388286] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:41,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903209784] [2022-04-06 10:33:41,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:33:41,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:41,206 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:41,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 10:33:41,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:33:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:33:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:33:41,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:33:41,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903209784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:41,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:41,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 43 [2022-04-06 10:33:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051824281] [2022-04-06 10:33:41,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:41,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:33:41,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:33:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1709, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:33:41,985 INFO L87 Difference]: Start difference. First operand 840 states and 949 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:44,606 INFO L93 Difference]: Finished difference Result 846 states and 954 transitions. [2022-04-06 10:33:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:33:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-06 10:33:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:44,610 INFO L225 Difference]: With dead ends: 846 [2022-04-06 10:33:44,610 INFO L226 Difference]: Without dead ends: 824 [2022-04-06 10:33:44,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 10:33:44,614 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 186 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5897 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 5937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:44,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 295 Invalid, 5937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5897 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 10:33:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-04-06 10:33:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-04-06 10:33:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-06 10:33:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 931 transitions. [2022-04-06 10:33:44,934 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 931 transitions. Word has length 55 [2022-04-06 10:33:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:44,934 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 931 transitions. [2022-04-06 10:33:44,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 931 transitions. [2022-04-06 10:33:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:44,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:44,939 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:33:44,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 10:33:45,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:45,146 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash 119567148, now seen corresponding path program 72 times [2022-04-06 10:33:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:45,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429163259] [2022-04-06 10:33:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:45,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:45,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:45,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:33:45,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:45,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429163259] [2022-04-06 10:33:45,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429163259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:45,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607510747] [2022-04-06 10:33:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:33:45,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:45,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:45,610 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:45,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 10:33:45,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:33:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:33:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:33:46,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:33:46,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607510747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:46,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:46,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 43 [2022-04-06 10:33:46,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099333374] [2022-04-06 10:33:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:46,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:33:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:33:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:33:46,436 INFO L87 Difference]: Start difference. First operand 824 states and 931 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:48,387 INFO L93 Difference]: Finished difference Result 830 states and 936 transitions. [2022-04-06 10:33:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:33:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-06 10:33:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:48,391 INFO L225 Difference]: With dead ends: 830 [2022-04-06 10:33:48,391 INFO L226 Difference]: Without dead ends: 806 [2022-04-06 10:33:48,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=5133, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 10:33:48,395 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 151 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:48,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 235 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3765 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 10:33:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-04-06 10:33:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-04-06 10:33:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 722 states have (on average 1.1440443213296398) internal successors, (826), 772 states have internal predecessors, (826), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-04-06 10:33:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 911 transitions. [2022-04-06 10:33:48,654 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 911 transitions. Word has length 55 [2022-04-06 10:33:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:48,654 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 911 transitions. [2022-04-06 10:33:48,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 911 transitions. [2022-04-06 10:33:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:48,659 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:48,659 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:33:48,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 10:33:48,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-06 10:33:48,860 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -248588457, now seen corresponding path program 73 times [2022-04-06 10:33:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:48,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414983402] [2022-04-06 10:33:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:48,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:49,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:33:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:49,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414983402] [2022-04-06 10:33:49,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414983402] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303836632] [2022-04-06 10:33:49,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:33:49,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:49,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:49,282 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:49,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 10:33:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:49,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:33:49,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:33:49,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:33:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303836632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:50,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 43 [2022-04-06 10:33:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225768550] [2022-04-06 10:33:50,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:50,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:33:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:33:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:33:50,159 INFO L87 Difference]: Start difference. First operand 806 states and 911 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:51,729 INFO L93 Difference]: Finished difference Result 812 states and 916 transitions. [2022-04-06 10:33:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:33:51,729 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-06 10:33:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:51,733 INFO L225 Difference]: With dead ends: 812 [2022-04-06 10:33:51,733 INFO L226 Difference]: Without dead ends: 786 [2022-04-06 10:33:51,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 10:33:51,737 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 114 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:51,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 205 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 10:33:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-04-06 10:33:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-04-06 10:33:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 705 states have (on average 1.1446808510638298) internal successors, (807), 753 states have internal predecessors, (807), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-04-06 10:33:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 889 transitions. [2022-04-06 10:33:51,990 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 889 transitions. Word has length 55 [2022-04-06 10:33:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:51,990 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 889 transitions. [2022-04-06 10:33:51,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 889 transitions. [2022-04-06 10:33:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:51,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:51,995 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2022-04-06 10:33:52,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 10:33:52,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:52,196 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:52,196 INFO L85 PathProgramCache]: Analyzing trace with hash 657110074, now seen corresponding path program 74 times [2022-04-06 10:33:52,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:52,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062984771] [2022-04-06 10:33:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:52,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:52,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:52,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 10:33:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 10:33:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:52,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062984771] [2022-04-06 10:33:52,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062984771] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:52,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278487510] [2022-04-06 10:33:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:33:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:52,450 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:52,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 10:33:52,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:33:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 10:33:52,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 10:33:52,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 10:33:53,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278487510] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:53,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:53,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-04-06 10:33:53,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284694007] [2022-04-06 10:33:53,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:53,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:33:53,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:33:53,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:33:53,418 INFO L87 Difference]: Start difference. First operand 786 states and 889 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:33:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:55,375 INFO L93 Difference]: Finished difference Result 874 states and 995 transitions. [2022-04-06 10:33:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 10:33:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 10:33:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:55,385 INFO L225 Difference]: With dead ends: 874 [2022-04-06 10:33:55,385 INFO L226 Difference]: Without dead ends: 856 [2022-04-06 10:33:55,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 10:33:55,390 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 463 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:55,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 200 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 10:33:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-04-06 10:33:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 851. [2022-04-06 10:33:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 743 states have (on average 1.135935397039031) internal successors, (844), 809 states have internal predecessors, (844), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-04-06 10:33:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 962 transitions. [2022-04-06 10:33:55,682 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 962 transitions. Word has length 55 [2022-04-06 10:33:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:55,682 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 962 transitions. [2022-04-06 10:33:55,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:33:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 962 transitions. [2022-04-06 10:33:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:55,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:55,688 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2022-04-06 10:33:55,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 10:33:55,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:55,888 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1188439180, now seen corresponding path program 75 times [2022-04-06 10:33:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:55,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635565624] [2022-04-06 10:33:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:55,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:55,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:56,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:33:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:33:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635565624] [2022-04-06 10:33:56,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635565624] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440551204] [2022-04-06 10:33:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:33:56,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:56,291 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:56,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 10:33:56,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 10:33:56,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 10:33:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:33:56,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:33:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:33:57,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440551204] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:33:57,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:33:57,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2022-04-06 10:33:57,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19962382] [2022-04-06 10:33:57,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:33:57,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 10:33:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:33:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 10:33:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 10:33:57,214 INFO L87 Difference]: Start difference. First operand 851 states and 962 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:33:58,584 INFO L93 Difference]: Finished difference Result 869 states and 984 transitions. [2022-04-06 10:33:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:33:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-04-06 10:33:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:33:58,590 INFO L225 Difference]: With dead ends: 869 [2022-04-06 10:33:58,590 INFO L226 Difference]: Without dead ends: 851 [2022-04-06 10:33:58,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=4557, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 10:33:58,596 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:33:58,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 208 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:33:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-04-06 10:33:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2022-04-06 10:33:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 738 states have (on average 1.1382113821138211) internal successors, (840), 804 states have internal predecessors, (840), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-04-06 10:33:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 958 transitions. [2022-04-06 10:33:58,856 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 958 transitions. Word has length 55 [2022-04-06 10:33:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:33:58,856 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 958 transitions. [2022-04-06 10:33:58,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:33:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 958 transitions. [2022-04-06 10:33:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 10:33:58,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:33:58,862 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2022-04-06 10:33:58,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 10:33:59,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-04-06 10:33:59,063 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:33:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:33:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1923856847, now seen corresponding path program 76 times [2022-04-06 10:33:59,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:33:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400575423] [2022-04-06 10:33:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:33:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:33:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:33:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:33:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:59,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:33:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:33:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 10:33:59,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:33:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400575423] [2022-04-06 10:33:59,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400575423] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:33:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729405111] [2022-04-06 10:33:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:33:59,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:33:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:33:59,320 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:33:59,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 10:33:59,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:33:59,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:33:59,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 10:33:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:33:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 10:33:59,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 10:34:00,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729405111] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:00,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:00,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-04-06 10:34:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859408793] [2022-04-06 10:34:00,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:00,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:00,289 INFO L87 Difference]: Start difference. First operand 846 states and 958 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:02,263 INFO L93 Difference]: Finished difference Result 860 states and 971 transitions. [2022-04-06 10:34:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 10:34:02,267 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-06 10:34:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:02,273 INFO L225 Difference]: With dead ends: 860 [2022-04-06 10:34:02,273 INFO L226 Difference]: Without dead ends: 834 [2022-04-06 10:34:02,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 10:34:02,278 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 605 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:02,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 203 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2670 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 10:34:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-06 10:34:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2022-04-06 10:34:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 724 states have (on average 1.138121546961326) internal successors, (824), 790 states have internal predecessors, (824), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2022-04-06 10:34:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 934 transitions. [2022-04-06 10:34:02,535 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 934 transitions. Word has length 55 [2022-04-06 10:34:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:02,535 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 934 transitions. [2022-04-06 10:34:02,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 934 transitions. [2022-04-06 10:34:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 10:34:02,541 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:02,541 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 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] [2022-04-06 10:34:02,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 10:34:02,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:02,741 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 938521523, now seen corresponding path program 77 times [2022-04-06 10:34:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:02,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129866569] [2022-04-06 10:34:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:02,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:34:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:03,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129866569] [2022-04-06 10:34:03,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129866569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747461050] [2022-04-06 10:34:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:34:03,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:03,193 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:03,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 10:34:03,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-04-06 10:34:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 10:34:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:04,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:05,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747461050] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:05,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:05,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-04-06 10:34:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750684838] [2022-04-06 10:34:05,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:05,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 10:34:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 10:34:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 10:34:05,280 INFO L87 Difference]: Start difference. First operand 832 states and 934 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:10,563 INFO L93 Difference]: Finished difference Result 948 states and 1071 transitions. [2022-04-06 10:34:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 10:34:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-06 10:34:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:10,570 INFO L225 Difference]: With dead ends: 948 [2022-04-06 10:34:10,570 INFO L226 Difference]: Without dead ends: 934 [2022-04-06 10:34:10,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 10:34:10,576 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 1454 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7558 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 7558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:10,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 336 Invalid, 7727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 7558 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 10:34:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-06 10:34:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2022-04-06 10:34:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 805 states have (on average 1.1366459627329193) internal successors, (915), 879 states have internal predecessors, (915), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2022-04-06 10:34:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1041 transitions. [2022-04-06 10:34:10,876 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1041 transitions. Word has length 56 [2022-04-06 10:34:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:10,877 INFO L478 AbstractCegarLoop]: Abstraction has 925 states and 1041 transitions. [2022-04-06 10:34:10,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1041 transitions. [2022-04-06 10:34:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 10:34:10,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:10,883 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 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] [2022-04-06 10:34:10,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 10:34:11,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:11,084 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1584271747, now seen corresponding path program 78 times [2022-04-06 10:34:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:11,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607560862] [2022-04-06 10:34:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:11,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:11,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:11,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:11,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607560862] [2022-04-06 10:34:11,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607560862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949715973] [2022-04-06 10:34:11,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:34:11,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:11,543 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:11,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 10:34:11,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 10:34:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 10:34:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:13,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949715973] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:13,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:13,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-04-06 10:34:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361545716] [2022-04-06 10:34:13,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:13,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 10:34:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 10:34:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 10:34:13,593 INFO L87 Difference]: Start difference. First operand 925 states and 1041 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:18,813 INFO L93 Difference]: Finished difference Result 940 states and 1056 transitions. [2022-04-06 10:34:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 10:34:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-04-06 10:34:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:18,817 INFO L225 Difference]: With dead ends: 940 [2022-04-06 10:34:18,817 INFO L226 Difference]: Without dead ends: 928 [2022-04-06 10:34:18,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 10:34:18,823 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 1525 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 6677 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 6827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 6677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:18,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 313 Invalid, 6827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 6677 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 10:34:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-06 10:34:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 926. [2022-04-06 10:34:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 806 states have (on average 1.1364764267990075) internal successors, (916), 880 states have internal predecessors, (916), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-04-06 10:34:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1037 transitions. [2022-04-06 10:34:19,133 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1037 transitions. Word has length 56 [2022-04-06 10:34:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:19,133 INFO L478 AbstractCegarLoop]: Abstraction has 926 states and 1037 transitions. [2022-04-06 10:34:19,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1037 transitions. [2022-04-06 10:34:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 10:34:19,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:19,154 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-04-06 10:34:19,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 10:34:19,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:19,355 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2014023679, now seen corresponding path program 79 times [2022-04-06 10:34:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:19,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385100504] [2022-04-06 10:34:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:19,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:19,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:19,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 10:34:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:34:19,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385100504] [2022-04-06 10:34:19,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385100504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825220847] [2022-04-06 10:34:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:34:19,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:19,465 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:19,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 10:34:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:34:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:34:19,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:34:19,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825220847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:19,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:19,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-04-06 10:34:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147934584] [2022-04-06 10:34:19,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:19,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 10:34:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 10:34:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-06 10:34:19,772 INFO L87 Difference]: Start difference. First operand 926 states and 1037 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:20,483 INFO L93 Difference]: Finished difference Result 1404 states and 1549 transitions. [2022-04-06 10:34:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 10:34:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-04-06 10:34:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:20,492 INFO L225 Difference]: With dead ends: 1404 [2022-04-06 10:34:20,492 INFO L226 Difference]: Without dead ends: 925 [2022-04-06 10:34:20,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 10:34:20,498 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:20,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 74 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:34:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-04-06 10:34:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2022-04-06 10:34:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 803 states have (on average 1.13200498132005) internal successors, (909), 873 states have internal predecessors, (909), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-04-06 10:34:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1022 transitions. [2022-04-06 10:34:20,832 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1022 transitions. Word has length 56 [2022-04-06 10:34:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:20,833 INFO L478 AbstractCegarLoop]: Abstraction has 917 states and 1022 transitions. [2022-04-06 10:34:20,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1022 transitions. [2022-04-06 10:34:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 10:34:20,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:20,839 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-04-06 10:34:20,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 10:34:21,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-04-06 10:34:21,039 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1442036278, now seen corresponding path program 80 times [2022-04-06 10:34:21,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:21,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064294235] [2022-04-06 10:34:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:21,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:34:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064294235] [2022-04-06 10:34:21,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064294235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268474395] [2022-04-06 10:34:21,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:34:21,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:21,160 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:21,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 10:34:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:34:21,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:21,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:34:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:34:21,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:34:21,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268474395] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:21,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:21,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-04-06 10:34:21,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678892921] [2022-04-06 10:34:21,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:21,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 10:34:21,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 10:34:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-06 10:34:21,462 INFO L87 Difference]: Start difference. First operand 917 states and 1022 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:34:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:22,213 INFO L93 Difference]: Finished difference Result 967 states and 1082 transitions. [2022-04-06 10:34:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 10:34:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-04-06 10:34:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:22,217 INFO L225 Difference]: With dead ends: 967 [2022-04-06 10:34:22,217 INFO L226 Difference]: Without dead ends: 928 [2022-04-06 10:34:22,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 10:34:22,224 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:22,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 84 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:34:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-06 10:34:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-04-06 10:34:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-04-06 10:34:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1033 transitions. [2022-04-06 10:34:22,550 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1033 transitions. Word has length 56 [2022-04-06 10:34:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:22,550 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1033 transitions. [2022-04-06 10:34:22,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:34:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1033 transitions. [2022-04-06 10:34:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 10:34:22,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:22,556 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 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] [2022-04-06 10:34:22,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 10:34:22,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 10:34:22,758 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1590562, now seen corresponding path program 81 times [2022-04-06 10:34:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:22,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442135606] [2022-04-06 10:34:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:22,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:23,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:34:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442135606] [2022-04-06 10:34:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442135606] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948102628] [2022-04-06 10:34:23,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:34:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:23,401 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:23,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 10:34:23,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-06 10:34:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 10:34:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:34:23,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:34:24,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948102628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:24,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:24,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 45 [2022-04-06 10:34:24,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800828297] [2022-04-06 10:34:24,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:24,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:24,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1883, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:24,094 INFO L87 Difference]: Start difference. First operand 928 states and 1033 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:27,345 INFO L93 Difference]: Finished difference Result 1052 states and 1172 transitions. [2022-04-06 10:34:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 10:34:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-06 10:34:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:27,351 INFO L225 Difference]: With dead ends: 1052 [2022-04-06 10:34:27,351 INFO L226 Difference]: Without dead ends: 1046 [2022-04-06 10:34:27,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=277, Invalid=6365, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 10:34:27,363 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 272 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7390 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 7390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:27,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 318 Invalid, 7448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 7390 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 10:34:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-06 10:34:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 944. [2022-04-06 10:34:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 827 states have (on average 1.1305925030229746) internal successors, (935), 899 states have internal predecessors, (935), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2022-04-06 10:34:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1052 transitions. [2022-04-06 10:34:27,692 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1052 transitions. Word has length 57 [2022-04-06 10:34:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:27,692 INFO L478 AbstractCegarLoop]: Abstraction has 944 states and 1052 transitions. [2022-04-06 10:34:27,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1052 transitions. [2022-04-06 10:34:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 10:34:27,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:27,701 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 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, 1, 1, 1, 1] [2022-04-06 10:34:27,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 10:34:27,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:27,912 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 909467431, now seen corresponding path program 82 times [2022-04-06 10:34:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738570453] [2022-04-06 10:34:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:34:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:28,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738570453] [2022-04-06 10:34:28,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738570453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:28,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925949878] [2022-04-06 10:34:28,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:34:28,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:28,476 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:28,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 10:34:28,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:34:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:34:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:34:29,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:34:29,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925949878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:29,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:29,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 45 [2022-04-06 10:34:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408772784] [2022-04-06 10:34:29,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:29,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:29,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1879, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:29,308 INFO L87 Difference]: Start difference. First operand 944 states and 1052 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:32,284 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2022-04-06 10:34:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:34:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-06 10:34:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:32,288 INFO L225 Difference]: With dead ends: 950 [2022-04-06 10:34:32,288 INFO L226 Difference]: Without dead ends: 928 [2022-04-06 10:34:32,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=279, Invalid=6041, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 10:34:32,295 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 198 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6605 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 6645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:32,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 306 Invalid, 6645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 6605 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 10:34:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-04-06 10:34:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-04-06 10:34:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2022-04-06 10:34:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1034 transitions. [2022-04-06 10:34:32,618 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1034 transitions. Word has length 57 [2022-04-06 10:34:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:32,618 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1034 transitions. [2022-04-06 10:34:32,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1034 transitions. [2022-04-06 10:34:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 10:34:32,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:32,625 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:34:32,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 10:34:32,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 10:34:32,825 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 108618946, now seen corresponding path program 83 times [2022-04-06 10:34:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:32,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911677484] [2022-04-06 10:34:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:32,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:32,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:32,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:33,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:34:33,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911677484] [2022-04-06 10:34:33,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911677484] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414550472] [2022-04-06 10:34:33,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:34:33,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:33,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:33,354 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:33,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 10:34:33,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:34:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:34:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:34:33,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:34:34,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414550472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:34,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:34,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 45 [2022-04-06 10:34:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606507169] [2022-04-06 10:34:34,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:34,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1875, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:34,229 INFO L87 Difference]: Start difference. First operand 928 states and 1034 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:36,753 INFO L93 Difference]: Finished difference Result 934 states and 1039 transitions. [2022-04-06 10:34:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:34:36,754 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-06 10:34:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:36,758 INFO L225 Difference]: With dead ends: 934 [2022-04-06 10:34:36,758 INFO L226 Difference]: Without dead ends: 910 [2022-04-06 10:34:36,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=5725, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 10:34:36,763 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 163 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5335 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:36,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 281 Invalid, 5375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5335 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 10:34:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-04-06 10:34:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 910. [2022-04-06 10:34:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 799 states have (on average 1.130162703379224) internal successors, (903), 867 states have internal predecessors, (903), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2022-04-06 10:34:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1014 transitions. [2022-04-06 10:34:37,082 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1014 transitions. Word has length 57 [2022-04-06 10:34:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:37,083 INFO L478 AbstractCegarLoop]: Abstraction has 910 states and 1014 transitions. [2022-04-06 10:34:37,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1014 transitions. [2022-04-06 10:34:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 10:34:37,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:37,089 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:34:37,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 10:34:37,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:37,289 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash -851422329, now seen corresponding path program 84 times [2022-04-06 10:34:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:37,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716047745] [2022-04-06 10:34:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:37,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:37,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:34:37,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716047745] [2022-04-06 10:34:37,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716047745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708625134] [2022-04-06 10:34:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:34:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:37,773 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:37,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 10:34:37,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:34:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:34:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:34:38,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:34:38,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708625134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:38,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:38,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 45 [2022-04-06 10:34:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475093854] [2022-04-06 10:34:38,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:38,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:38,744 INFO L87 Difference]: Start difference. First operand 910 states and 1014 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:40,835 INFO L93 Difference]: Finished difference Result 916 states and 1019 transitions. [2022-04-06 10:34:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:34:40,835 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-06 10:34:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:40,839 INFO L225 Difference]: With dead ends: 916 [2022-04-06 10:34:40,839 INFO L226 Difference]: Without dead ends: 890 [2022-04-06 10:34:40,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 10:34:40,844 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 126 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4020 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:40,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 251 Invalid, 4058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4020 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:34:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-04-06 10:34:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2022-04-06 10:34:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 782 states have (on average 1.1304347826086956) internal successors, (884), 848 states have internal predecessors, (884), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2022-04-06 10:34:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 992 transitions. [2022-04-06 10:34:41,152 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 992 transitions. Word has length 57 [2022-04-06 10:34:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:41,152 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 992 transitions. [2022-04-06 10:34:41,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 992 transitions. [2022-04-06 10:34:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 10:34:41,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:41,158 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:34:41,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 10:34:41,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:41,359 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash 637590626, now seen corresponding path program 85 times [2022-04-06 10:34:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:41,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513074580] [2022-04-06 10:34:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:41,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:41,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:41,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:34:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513074580] [2022-04-06 10:34:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513074580] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028827934] [2022-04-06 10:34:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:34:41,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:41,803 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:41,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 10:34:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:34:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:34:42,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:34:42,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028827934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:42,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:42,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 45 [2022-04-06 10:34:42,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751291952] [2022-04-06 10:34:42,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:42,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1867, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:42,773 INFO L87 Difference]: Start difference. First operand 890 states and 992 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:44,543 INFO L93 Difference]: Finished difference Result 896 states and 997 transitions. [2022-04-06 10:34:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:34:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-06 10:34:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:44,546 INFO L225 Difference]: With dead ends: 896 [2022-04-06 10:34:44,547 INFO L226 Difference]: Without dead ends: 868 [2022-04-06 10:34:44,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=285, Invalid=5117, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 10:34:44,552 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:44,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 236 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 10:34:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-04-06 10:34:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-04-06 10:34:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 763 states have (on average 1.1310615989515072) internal successors, (863), 827 states have internal predecessors, (863), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2022-04-06 10:34:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 968 transitions. [2022-04-06 10:34:44,848 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 968 transitions. Word has length 57 [2022-04-06 10:34:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:44,848 INFO L478 AbstractCegarLoop]: Abstraction has 868 states and 968 transitions. [2022-04-06 10:34:44,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 968 transitions. [2022-04-06 10:34:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 10:34:44,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:44,854 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-04-06 10:34:44,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 10:34:45,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:45,054 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1668804583, now seen corresponding path program 86 times [2022-04-06 10:34:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:45,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556059175] [2022-04-06 10:34:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:45,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:45,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:34:45,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556059175] [2022-04-06 10:34:45,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556059175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142459319] [2022-04-06 10:34:45,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:34:45,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:45,451 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:45,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 10:34:45,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:34:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 10:34:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:34:46,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:34:46,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142459319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:46,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:46,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 45 [2022-04-06 10:34:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048229493] [2022-04-06 10:34:46,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:46,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 10:34:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 10:34:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 10:34:46,449 INFO L87 Difference]: Start difference. First operand 868 states and 968 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:47,705 INFO L93 Difference]: Finished difference Result 886 states and 989 transitions. [2022-04-06 10:34:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:34:47,705 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-04-06 10:34:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:47,711 INFO L225 Difference]: With dead ends: 886 [2022-04-06 10:34:47,711 INFO L226 Difference]: Without dead ends: 880 [2022-04-06 10:34:47,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=287, Invalid=4825, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 10:34:47,716 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:47,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 171 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:34:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-04-06 10:34:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2022-04-06 10:34:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 770 states have (on average 1.1324675324675324) internal successors, (872), 836 states have internal predecessors, (872), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2022-04-06 10:34:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 981 transitions. [2022-04-06 10:34:48,024 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 981 transitions. Word has length 57 [2022-04-06 10:34:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:48,024 INFO L478 AbstractCegarLoop]: Abstraction has 878 states and 981 transitions. [2022-04-06 10:34:48,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:34:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 981 transitions. [2022-04-06 10:34:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 10:34:48,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:48,030 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 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] [2022-04-06 10:34:48,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 10:34:48,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:48,230 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1918681885, now seen corresponding path program 87 times [2022-04-06 10:34:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:48,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668305945] [2022-04-06 10:34:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:48,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:34:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:48,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668305945] [2022-04-06 10:34:48,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668305945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596139230] [2022-04-06 10:34:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:34:48,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:48,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:48,743 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:48,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 10:34:48,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-06 10:34:48,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:48,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 10:34:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:49,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:34:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:51,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596139230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:34:51,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:34:51,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-04-06 10:34:51,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28296759] [2022-04-06 10:34:51,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:34:51,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 10:34:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:34:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 10:34:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 10:34:51,269 INFO L87 Difference]: Start difference. First operand 878 states and 981 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:34:57,457 INFO L93 Difference]: Finished difference Result 996 states and 1120 transitions. [2022-04-06 10:34:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 10:34:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-06 10:34:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:34:57,467 INFO L225 Difference]: With dead ends: 996 [2022-04-06 10:34:57,467 INFO L226 Difference]: Without dead ends: 982 [2022-04-06 10:34:57,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 10:34:57,473 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 1785 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8227 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 8227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:34:57,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 341 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 8227 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 10:34:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-04-06 10:34:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 973. [2022-04-06 10:34:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 853 states have (on average 1.1313012895662369) internal successors, (965), 927 states have internal predecessors, (965), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2022-04-06 10:34:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1090 transitions. [2022-04-06 10:34:57,834 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1090 transitions. Word has length 58 [2022-04-06 10:34:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:34:57,834 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1090 transitions. [2022-04-06 10:34:57,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:34:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1090 transitions. [2022-04-06 10:34:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 10:34:57,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:34:57,841 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 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] [2022-04-06 10:34:57,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 10:34:58,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:58,041 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:34:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:34:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1021501843, now seen corresponding path program 88 times [2022-04-06 10:34:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:34:58,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71079834] [2022-04-06 10:34:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:34:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:34:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:58,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:34:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:34:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:34:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:34:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:58,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:34:58,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71079834] [2022-04-06 10:34:58,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71079834] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:34:58,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992489186] [2022-04-06 10:34:58,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:34:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:34:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:34:58,556 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:34:58,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 10:34:58,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:34:58,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:34:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 10:34:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:34:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:34:59,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:35:00,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992489186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:00,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:00,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-04-06 10:35:00,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307894842] [2022-04-06 10:35:00,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:00,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 10:35:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 10:35:00,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 10:35:00,957 INFO L87 Difference]: Start difference. First operand 973 states and 1090 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:35:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:07,429 INFO L93 Difference]: Finished difference Result 988 states and 1105 transitions. [2022-04-06 10:35:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 10:35:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-04-06 10:35:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:07,434 INFO L225 Difference]: With dead ends: 988 [2022-04-06 10:35:07,434 INFO L226 Difference]: Without dead ends: 976 [2022-04-06 10:35:07,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 10:35:07,440 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 1772 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 8865 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 9040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 8865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:07,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1795 Valid, 373 Invalid, 9040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 8865 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 10:35:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-04-06 10:35:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2022-04-06 10:35:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 854 states have (on average 1.1311475409836065) internal successors, (966), 928 states have internal predecessors, (966), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-06 10:35:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1086 transitions. [2022-04-06 10:35:07,801 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1086 transitions. Word has length 58 [2022-04-06 10:35:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:07,801 INFO L478 AbstractCegarLoop]: Abstraction has 974 states and 1086 transitions. [2022-04-06 10:35:07,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:35:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1086 transitions. [2022-04-06 10:35:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 10:35:07,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:07,808 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 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] [2022-04-06 10:35:07,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 10:35:08,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 10:35:08,009 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 108687446, now seen corresponding path program 89 times [2022-04-06 10:35:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948251064] [2022-04-06 10:35:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:08,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:35:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:35:08,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948251064] [2022-04-06 10:35:08,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948251064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364270864] [2022-04-06 10:35:08,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:35:08,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:08,148 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:08,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 10:35:08,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:35:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:08,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 10:35:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:35:08,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:35:08,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364270864] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:08,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:08,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-04-06 10:35:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589496163] [2022-04-06 10:35:08,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:08,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 10:35:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 10:35:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-06 10:35:08,558 INFO L87 Difference]: Start difference. First operand 974 states and 1086 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:35:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:09,567 INFO L93 Difference]: Finished difference Result 1174 states and 1323 transitions. [2022-04-06 10:35:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:35:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-04-06 10:35:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:09,574 INFO L225 Difference]: With dead ends: 1174 [2022-04-06 10:35:09,574 INFO L226 Difference]: Without dead ends: 1120 [2022-04-06 10:35:09,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 10:35:09,582 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 205 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:09,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 74 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:35:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-04-06 10:35:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1084. [2022-04-06 10:35:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 964 states have (on average 1.129668049792531) internal successors, (1089), 1038 states have internal predecessors, (1089), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-06 10:35:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1209 transitions. [2022-04-06 10:35:10,007 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1209 transitions. Word has length 58 [2022-04-06 10:35:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:10,007 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1209 transitions. [2022-04-06 10:35:10,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:35:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1209 transitions. [2022-04-06 10:35:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 10:35:10,016 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:10,016 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 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] [2022-04-06 10:35:10,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 10:35:10,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 10:35:10,216 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:10,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash -127636287, now seen corresponding path program 90 times [2022-04-06 10:35:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:10,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822745641] [2022-04-06 10:35:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:10,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:10,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:10,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:35:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822745641] [2022-04-06 10:35:10,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822745641] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776001564] [2022-04-06 10:35:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:35:10,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:10,337 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 10:35:10,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 10:35:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:10,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 10:35:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:35:10,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:35:10,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776001564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:10,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:10,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-04-06 10:35:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335694767] [2022-04-06 10:35:10,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:10,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 10:35:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 10:35:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-06 10:35:10,685 INFO L87 Difference]: Start difference. First operand 1084 states and 1209 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:11,766 INFO L93 Difference]: Finished difference Result 1860 states and 2065 transitions. [2022-04-06 10:35:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:35:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-04-06 10:35:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:11,784 INFO L225 Difference]: With dead ends: 1860 [2022-04-06 10:35:11,784 INFO L226 Difference]: Without dead ends: 1230 [2022-04-06 10:35:11,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 10:35:11,793 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:11,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 79 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:35:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-04-06 10:35:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1194. [2022-04-06 10:35:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-04-06 10:35:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1332 transitions. [2022-04-06 10:35:12,279 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1332 transitions. Word has length 58 [2022-04-06 10:35:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:12,279 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1332 transitions. [2022-04-06 10:35:12,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1332 transitions. [2022-04-06 10:35:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:12,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:12,288 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 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] [2022-04-06 10:35:12,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 10:35:12,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 10:35:12,489 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash -823806772, now seen corresponding path program 91 times [2022-04-06 10:35:12,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:12,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670380823] [2022-04-06 10:35:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:12,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:35:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:13,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670380823] [2022-04-06 10:35:13,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670380823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:13,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775230157] [2022-04-06 10:35:13,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:35:13,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:13,168 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:13,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 10:35:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:13,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 10:35:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:35:13,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:35:13,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775230157] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:13,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:13,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 47 [2022-04-06 10:35:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027208376] [2022-04-06 10:35:13,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:13,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 10:35:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 10:35:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2061, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:35:13,946 INFO L87 Difference]: Start difference. First operand 1194 states and 1332 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:17,663 INFO L93 Difference]: Finished difference Result 1336 states and 1491 transitions. [2022-04-06 10:35:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 10:35:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-06 10:35:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:17,689 INFO L225 Difference]: With dead ends: 1336 [2022-04-06 10:35:17,690 INFO L226 Difference]: Without dead ends: 1330 [2022-04-06 10:35:17,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=289, Invalid=7021, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 10:35:17,728 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 296 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8072 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 8132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 8072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:17,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 330 Invalid, 8132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 8072 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 10:35:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-04-06 10:35:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1210. [2022-04-06 10:35:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1087 states have (on average 1.1287948482060717) internal successors, (1227), 1163 states have internal predecessors, (1227), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2022-04-06 10:35:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1351 transitions. [2022-04-06 10:35:18,217 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1351 transitions. Word has length 59 [2022-04-06 10:35:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:18,217 INFO L478 AbstractCegarLoop]: Abstraction has 1210 states and 1351 transitions. [2022-04-06 10:35:18,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1351 transitions. [2022-04-06 10:35:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:18,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:18,226 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 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, 1, 1, 1, 1] [2022-04-06 10:35:18,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:18,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 10:35:18,427 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash -513372681, now seen corresponding path program 92 times [2022-04-06 10:35:18,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:18,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131479160] [2022-04-06 10:35:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:18,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:18,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:18,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:35:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131479160] [2022-04-06 10:35:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131479160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116201701] [2022-04-06 10:35:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:35:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:19,053 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:19,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 10:35:19,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:35:19,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:19,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 10:35:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:35:19,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:35:19,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116201701] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:19,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:19,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 47 [2022-04-06 10:35:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863429085] [2022-04-06 10:35:19,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:19,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 10:35:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 10:35:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2057, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:35:19,985 INFO L87 Difference]: Start difference. First operand 1210 states and 1351 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:23,422 INFO L93 Difference]: Finished difference Result 1216 states and 1356 transitions. [2022-04-06 10:35:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 10:35:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-06 10:35:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:23,428 INFO L225 Difference]: With dead ends: 1216 [2022-04-06 10:35:23,428 INFO L226 Difference]: Without dead ends: 1194 [2022-04-06 10:35:23,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=6681, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 10:35:23,435 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 223 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7314 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:23,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 320 Invalid, 7358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7314 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 10:35:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-04-06 10:35:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2022-04-06 10:35:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-04-06 10:35:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1333 transitions. [2022-04-06 10:35:23,922 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1333 transitions. Word has length 59 [2022-04-06 10:35:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:23,922 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1333 transitions. [2022-04-06 10:35:23,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1333 transitions. [2022-04-06 10:35:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:23,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:23,931 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:23,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:24,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:24,131 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1573824044, now seen corresponding path program 93 times [2022-04-06 10:35:24,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:24,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831302724] [2022-04-06 10:35:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:24,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:24,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:35:24,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:24,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831302724] [2022-04-06 10:35:24,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831302724] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:24,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854910696] [2022-04-06 10:35:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:35:24,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:24,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:24,723 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 10:35:24,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 10:35:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:24,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:35:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:35:25,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:35:25,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854910696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:25,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:25,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 47 [2022-04-06 10:35:25,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009401239] [2022-04-06 10:35:25,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:25,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 10:35:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 10:35:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2053, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:35:25,670 INFO L87 Difference]: Start difference. First operand 1194 states and 1333 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:28,621 INFO L93 Difference]: Finished difference Result 1200 states and 1338 transitions. [2022-04-06 10:35:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:35:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-06 10:35:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:28,627 INFO L225 Difference]: With dead ends: 1200 [2022-04-06 10:35:28,627 INFO L226 Difference]: Without dead ends: 1176 [2022-04-06 10:35:28,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=293, Invalid=6349, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 10:35:28,637 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 186 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5966 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 6010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:28,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 295 Invalid, 6010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5966 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 10:35:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-04-06 10:35:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-04-06 10:35:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1059 states have (on average 1.1284230406043436) internal successors, (1195), 1131 states have internal predecessors, (1195), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-04-06 10:35:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1313 transitions. [2022-04-06 10:35:29,199 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1313 transitions. Word has length 59 [2022-04-06 10:35:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:29,199 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1313 transitions. [2022-04-06 10:35:29,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1313 transitions. [2022-04-06 10:35:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:29,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:29,208 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:29,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 10:35:29,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 10:35:29,408 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2024949911, now seen corresponding path program 94 times [2022-04-06 10:35:29,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:29,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404683580] [2022-04-06 10:35:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:29,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:29,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:29,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:29,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:35:29,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404683580] [2022-04-06 10:35:29,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404683580] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252186930] [2022-04-06 10:35:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:35:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:29,940 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:29,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 10:35:30,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:35:30,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:30,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:35:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:35:30,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:35:30,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252186930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:30,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:30,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 47 [2022-04-06 10:35:30,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641029252] [2022-04-06 10:35:30,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:30,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 10:35:30,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:30,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 10:35:30,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:35:30,918 INFO L87 Difference]: Start difference. First operand 1176 states and 1313 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:33,412 INFO L93 Difference]: Finished difference Result 1182 states and 1318 transitions. [2022-04-06 10:35:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:35:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-06 10:35:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:33,417 INFO L225 Difference]: With dead ends: 1182 [2022-04-06 10:35:33,418 INFO L226 Difference]: Without dead ends: 1156 [2022-04-06 10:35:33,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=295, Invalid=6025, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 10:35:33,424 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4693 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:33,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 270 Invalid, 4735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4693 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 10:35:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-04-06 10:35:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2022-04-06 10:35:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1042 states have (on average 1.128598848368522) internal successors, (1176), 1112 states have internal predecessors, (1176), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2022-04-06 10:35:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1291 transitions. [2022-04-06 10:35:33,894 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1291 transitions. Word has length 59 [2022-04-06 10:35:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:33,894 INFO L478 AbstractCegarLoop]: Abstraction has 1156 states and 1291 transitions. [2022-04-06 10:35:33,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1291 transitions. [2022-04-06 10:35:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:33,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:33,902 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:33,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 10:35:34,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 10:35:34,103 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1441546356, now seen corresponding path program 95 times [2022-04-06 10:35:34,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:34,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216912941] [2022-04-06 10:35:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:34,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:34,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:34,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:35:34,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216912941] [2022-04-06 10:35:34,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216912941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942885162] [2022-04-06 10:35:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:35:34,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:34,590 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:34,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 10:35:34,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 10:35:34,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:34,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:35:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:35:35,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:35:35,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942885162] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:35,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:35,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-04-06 10:35:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430003052] [2022-04-06 10:35:35,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:35,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 10:35:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 10:35:35,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2045, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:35:35,597 INFO L87 Difference]: Start difference. First operand 1156 states and 1291 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:37,815 INFO L93 Difference]: Finished difference Result 1162 states and 1296 transitions. [2022-04-06 10:35:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:35:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-06 10:35:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:37,820 INFO L225 Difference]: With dead ends: 1162 [2022-04-06 10:35:37,820 INFO L226 Difference]: Without dead ends: 1134 [2022-04-06 10:35:37,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 10:35:37,826 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:37,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 260 Invalid, 3834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:35:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-04-06 10:35:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2022-04-06 10:35:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1091 states have internal predecessors, (1155), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2022-04-06 10:35:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1267 transitions. [2022-04-06 10:35:38,287 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1267 transitions. Word has length 59 [2022-04-06 10:35:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:38,287 INFO L478 AbstractCegarLoop]: Abstraction has 1134 states and 1267 transitions. [2022-04-06 10:35:38,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1267 transitions. [2022-04-06 10:35:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:38,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:38,295 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 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] [2022-04-06 10:35:38,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 10:35:38,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-06 10:35:38,495 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -27180401, now seen corresponding path program 96 times [2022-04-06 10:35:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760630025] [2022-04-06 10:35:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:38,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 10:35:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 10:35:38,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760630025] [2022-04-06 10:35:38,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760630025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153025841] [2022-04-06 10:35:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:35:38,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:38,805 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:38,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 10:35:38,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 10:35:38,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 10:35:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 10:35:39,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 10:35:39,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153025841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:39,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:39,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-04-06 10:35:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817287586] [2022-04-06 10:35:39,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:39,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:35:39,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:35:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:35:39,997 INFO L87 Difference]: Start difference. First operand 1134 states and 1267 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:35:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:42,726 INFO L93 Difference]: Finished difference Result 1238 states and 1393 transitions. [2022-04-06 10:35:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 10:35:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 10:35:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:42,743 INFO L225 Difference]: With dead ends: 1238 [2022-04-06 10:35:42,744 INFO L226 Difference]: Without dead ends: 1219 [2022-04-06 10:35:42,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 10:35:42,756 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 771 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:42,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 212 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:35:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-04-06 10:35:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1214. [2022-04-06 10:35:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1070 states have (on average 1.122429906542056) internal successors, (1201), 1160 states have internal predecessors, (1201), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-04-06 10:35:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1357 transitions. [2022-04-06 10:35:43,312 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1357 transitions. Word has length 59 [2022-04-06 10:35:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:43,312 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1357 transitions. [2022-04-06 10:35:43,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:35:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1357 transitions. [2022-04-06 10:35:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:43,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:43,322 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-04-06 10:35:43,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 10:35:43,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-04-06 10:35:43,522 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1371986743, now seen corresponding path program 97 times [2022-04-06 10:35:43,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468745391] [2022-04-06 10:35:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:43,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:43,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:43,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:43,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:35:43,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:43,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468745391] [2022-04-06 10:35:43,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468745391] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:43,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148197110] [2022-04-06 10:35:43,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:35:43,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:43,984 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:43,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 10:35:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:35:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:35:44,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:35:45,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148197110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:45,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:45,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 47 [2022-04-06 10:35:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620690437] [2022-04-06 10:35:45,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:45,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 10:35:45,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 10:35:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 10:35:45,034 INFO L87 Difference]: Start difference. First operand 1214 states and 1357 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:46,723 INFO L93 Difference]: Finished difference Result 1232 states and 1379 transitions. [2022-04-06 10:35:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:35:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-04-06 10:35:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:46,730 INFO L225 Difference]: With dead ends: 1232 [2022-04-06 10:35:46,730 INFO L226 Difference]: Without dead ends: 1213 [2022-04-06 10:35:46,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=299, Invalid=5401, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 10:35:46,739 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:46,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:35:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-04-06 10:35:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1208. [2022-04-06 10:35:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1064 states have (on average 1.1240601503759398) internal successors, (1196), 1154 states have internal predecessors, (1196), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-04-06 10:35:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1352 transitions. [2022-04-06 10:35:47,213 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1352 transitions. Word has length 59 [2022-04-06 10:35:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:47,213 INFO L478 AbstractCegarLoop]: Abstraction has 1208 states and 1352 transitions. [2022-04-06 10:35:47,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:35:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1352 transitions. [2022-04-06 10:35:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 10:35:47,222 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:47,222 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 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] [2022-04-06 10:35:47,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 10:35:47,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:47,424 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1280788378, now seen corresponding path program 98 times [2022-04-06 10:35:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:47,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074522615] [2022-04-06 10:35:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:47,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:35:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 10:35:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074522615] [2022-04-06 10:35:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074522615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544024655] [2022-04-06 10:35:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:35:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:47,727 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:47,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 10:35:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:35:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:47,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 10:35:47,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 10:35:48,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 10:35:48,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544024655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:48,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:48,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-04-06 10:35:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502829397] [2022-04-06 10:35:48,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:48,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:35:48,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:48,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:35:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:35:48,936 INFO L87 Difference]: Start difference. First operand 1208 states and 1352 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:35:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:51,784 INFO L93 Difference]: Finished difference Result 1222 states and 1365 transitions. [2022-04-06 10:35:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 10:35:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-06 10:35:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:51,795 INFO L225 Difference]: With dead ends: 1222 [2022-04-06 10:35:51,795 INFO L226 Difference]: Without dead ends: 1194 [2022-04-06 10:35:51,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 10:35:51,806 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 822 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:51,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 235 Invalid, 3767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 10:35:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-04-06 10:35:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1192. [2022-04-06 10:35:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1048 states have (on average 1.1240458015267176) internal successors, (1178), 1138 states have internal predecessors, (1178), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2022-04-06 10:35:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1324 transitions. [2022-04-06 10:35:52,330 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1324 transitions. Word has length 59 [2022-04-06 10:35:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:52,330 INFO L478 AbstractCegarLoop]: Abstraction has 1192 states and 1324 transitions. [2022-04-06 10:35:52,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:35:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1324 transitions. [2022-04-06 10:35:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 10:35:52,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:52,340 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 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] [2022-04-06 10:35:52,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-04-06 10:35:52,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 10:35:52,540 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2101168307, now seen corresponding path program 99 times [2022-04-06 10:35:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:52,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079980997] [2022-04-06 10:35:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:35:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:52,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:35:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:35:53,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079980997] [2022-04-06 10:35:53,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079980997] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811886419] [2022-04-06 10:35:53,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:35:53,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:53,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:53,097 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:53,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 10:35:53,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-06 10:35:53,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 10:35:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:35:54,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:35:55,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811886419] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:55,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:55,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-04-06 10:35:55,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605794385] [2022-04-06 10:35:55,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:55,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 10:35:55,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 10:35:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 10:35:55,790 INFO L87 Difference]: Start difference. First operand 1192 states and 1324 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:36:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:03,187 INFO L93 Difference]: Finished difference Result 1336 states and 1493 transitions. [2022-04-06 10:36:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 10:36:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-06 10:36:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:03,203 INFO L225 Difference]: With dead ends: 1336 [2022-04-06 10:36:03,204 INFO L226 Difference]: Without dead ends: 1322 [2022-04-06 10:36:03,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 10:36:03,214 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 2065 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 9689 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 9914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 9689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:03,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2070 Valid, 376 Invalid, 9914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 9689 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 10:36:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-04-06 10:36:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1313. [2022-04-06 10:36:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1154 states have (on average 1.123050259965338) internal successors, (1296), 1254 states have internal predecessors, (1296), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2022-04-06 10:36:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1462 transitions. [2022-04-06 10:36:03,762 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1462 transitions. Word has length 60 [2022-04-06 10:36:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:03,762 INFO L478 AbstractCegarLoop]: Abstraction has 1313 states and 1462 transitions. [2022-04-06 10:36:03,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:36:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1462 transitions. [2022-04-06 10:36:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 10:36:03,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:03,774 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 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] [2022-04-06 10:36:03,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 10:36:03,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:03,975 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash 58390781, now seen corresponding path program 100 times [2022-04-06 10:36:03,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613644356] [2022-04-06 10:36:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:03,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:04,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:36:04,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613644356] [2022-04-06 10:36:04,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613644356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983778789] [2022-04-06 10:36:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:36:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:04,540 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:04,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 10:36:04,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:36:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 10:36:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:36:05,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:36:07,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983778789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:07,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:07,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-04-06 10:36:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723020349] [2022-04-06 10:36:07,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:07,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 10:36:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 10:36:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 10:36:07,254 INFO L87 Difference]: Start difference. First operand 1313 states and 1462 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:36:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:14,541 INFO L93 Difference]: Finished difference Result 1328 states and 1477 transitions. [2022-04-06 10:36:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 10:36:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-04-06 10:36:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:14,548 INFO L225 Difference]: With dead ends: 1328 [2022-04-06 10:36:14,549 INFO L226 Difference]: Without dead ends: 1316 [2022-04-06 10:36:14,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 10:36:14,590 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 2088 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9400 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 9602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 9400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:14,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 373 Invalid, 9602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 9400 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 10:36:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-04-06 10:36:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1314. [2022-04-06 10:36:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1155 states have (on average 1.122943722943723) internal successors, (1297), 1255 states have internal predecessors, (1297), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-04-06 10:36:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1457 transitions. [2022-04-06 10:36:15,147 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1457 transitions. Word has length 60 [2022-04-06 10:36:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:15,147 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1457 transitions. [2022-04-06 10:36:15,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:36:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1457 transitions. [2022-04-06 10:36:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 10:36:15,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:15,159 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 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] [2022-04-06 10:36:15,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 10:36:15,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:15,360 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 684311254, now seen corresponding path program 101 times [2022-04-06 10:36:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230350409] [2022-04-06 10:36:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:15,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:15,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:15,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:15,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 10:36:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:36:15,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230350409] [2022-04-06 10:36:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230350409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518340691] [2022-04-06 10:36:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:36:15,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:15,478 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 10:36:15,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:36:15,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:15,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 10:36:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:36:15,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:36:15,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518340691] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:15,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:15,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-04-06 10:36:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743110544] [2022-04-06 10:36:15,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:15,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 10:36:15,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 10:36:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-04-06 10:36:15,828 INFO L87 Difference]: Start difference. First operand 1314 states and 1457 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:17,040 INFO L93 Difference]: Finished difference Result 1985 states and 2169 transitions. [2022-04-06 10:36:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 10:36:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-04-06 10:36:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:17,060 INFO L225 Difference]: With dead ends: 1985 [2022-04-06 10:36:17,060 INFO L226 Difference]: Without dead ends: 1315 [2022-04-06 10:36:17,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 10:36:17,079 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:17,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 103 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:36:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-04-06 10:36:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1307. [2022-04-06 10:36:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1154 states have (on average 1.1195840554592722) internal successors, (1292), 1250 states have internal predecessors, (1292), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-04-06 10:36:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1444 transitions. [2022-04-06 10:36:17,687 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1444 transitions. Word has length 60 [2022-04-06 10:36:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:17,687 INFO L478 AbstractCegarLoop]: Abstraction has 1307 states and 1444 transitions. [2022-04-06 10:36:17,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1444 transitions. [2022-04-06 10:36:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 10:36:17,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:17,697 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 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] [2022-04-06 10:36:17,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 10:36:17,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:17,898 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash -942862021, now seen corresponding path program 102 times [2022-04-06 10:36:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233380149] [2022-04-06 10:36:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:17,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:17,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:36:18,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:18,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233380149] [2022-04-06 10:36:18,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233380149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:18,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482902425] [2022-04-06 10:36:18,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:36:18,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:18,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:18,033 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:18,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 10:36:18,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 10:36:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 10:36:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:36:18,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:36:18,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482902425] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:18,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:18,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-04-06 10:36:18,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536469185] [2022-04-06 10:36:18,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:18,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 10:36:18,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:18,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 10:36:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-04-06 10:36:18,381 INFO L87 Difference]: Start difference. First operand 1307 states and 1444 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:36:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:19,513 INFO L93 Difference]: Finished difference Result 1365 states and 1514 transitions. [2022-04-06 10:36:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 10:36:19,514 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-04-06 10:36:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:19,520 INFO L225 Difference]: With dead ends: 1365 [2022-04-06 10:36:19,520 INFO L226 Difference]: Without dead ends: 1320 [2022-04-06 10:36:19,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 10:36:19,531 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:19,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 88 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:36:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-06 10:36:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-04-06 10:36:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-04-06 10:36:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1457 transitions. [2022-04-06 10:36:20,139 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1457 transitions. Word has length 60 [2022-04-06 10:36:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:20,139 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1457 transitions. [2022-04-06 10:36:20,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:36:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1457 transitions. [2022-04-06 10:36:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:20,150 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:20,150 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 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] [2022-04-06 10:36:20,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 10:36:20,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 10:36:20,351 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash -615478622, now seen corresponding path program 103 times [2022-04-06 10:36:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:20,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384388290] [2022-04-06 10:36:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:20,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:20,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:36:21,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384388290] [2022-04-06 10:36:21,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384388290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944290393] [2022-04-06 10:36:21,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:36:21,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:21,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:21,094 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:21,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 10:36:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 10:36:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:36:21,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:36:21,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944290393] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:21,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:21,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 49 [2022-04-06 10:36:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067667654] [2022-04-06 10:36:21,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:21,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:21,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:21,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:21,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:21,873 INFO L87 Difference]: Start difference. First operand 1320 states and 1457 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:26,356 INFO L93 Difference]: Finished difference Result 1470 states and 1624 transitions. [2022-04-06 10:36:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 10:36:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:26,366 INFO L225 Difference]: With dead ends: 1470 [2022-04-06 10:36:26,366 INFO L226 Difference]: Without dead ends: 1464 [2022-04-06 10:36:26,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=7709, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 10:36:26,379 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 314 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9959 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 10023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 9959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:26,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 368 Invalid, 10023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 9959 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 10:36:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-04-06 10:36:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2022-04-06 10:36:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1180 states have (on average 1.11864406779661) internal successors, (1320), 1278 states have internal predecessors, (1320), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2022-04-06 10:36:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1476 transitions. [2022-04-06 10:36:27,013 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1476 transitions. Word has length 61 [2022-04-06 10:36:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:27,013 INFO L478 AbstractCegarLoop]: Abstraction has 1336 states and 1476 transitions. [2022-04-06 10:36:27,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1476 transitions. [2022-04-06 10:36:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:27,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:27,025 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 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, 1, 1, 1, 1] [2022-04-06 10:36:27,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 10:36:27,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:27,229 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1917062041, now seen corresponding path program 104 times [2022-04-06 10:36:27,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:27,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526279030] [2022-04-06 10:36:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:27,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:27,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:27,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:27,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:36:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526279030] [2022-04-06 10:36:27,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526279030] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162346094] [2022-04-06 10:36:27,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:36:27,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:27,955 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:27,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 10:36:28,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:36:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 10:36:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:36:28,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:36:28,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162346094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:28,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:28,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 49 [2022-04-06 10:36:28,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104391903] [2022-04-06 10:36:28,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:28,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:28,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:28,886 INFO L87 Difference]: Start difference. First operand 1336 states and 1476 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:32,850 INFO L93 Difference]: Finished difference Result 1342 states and 1481 transitions. [2022-04-06 10:36:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 10:36:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:32,857 INFO L225 Difference]: With dead ends: 1342 [2022-04-06 10:36:32,857 INFO L226 Difference]: Without dead ends: 1320 [2022-04-06 10:36:32,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=303, Invalid=7353, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 10:36:32,871 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 235 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 8628 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 8628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:32,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 346 Invalid, 8672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 8628 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 10:36:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-06 10:36:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-04-06 10:36:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2022-04-06 10:36:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1458 transitions. [2022-04-06 10:36:33,455 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1458 transitions. Word has length 61 [2022-04-06 10:36:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:33,455 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1458 transitions. [2022-04-06 10:36:33,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1458 transitions. [2022-04-06 10:36:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:33,466 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:33,466 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:36:33,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-04-06 10:36:33,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:33,667 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1196260798, now seen corresponding path program 105 times [2022-04-06 10:36:33,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:33,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779677257] [2022-04-06 10:36:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:33,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:36:34,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779677257] [2022-04-06 10:36:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779677257] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258967383] [2022-04-06 10:36:34,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:36:34,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:34,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:34,356 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:34,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 10:36:34,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 10:36:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 10:36:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:36:35,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:36:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258967383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:35,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:35,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 49 [2022-04-06 10:36:35,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974801552] [2022-04-06 10:36:35,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:35,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:35,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2239, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:35,355 INFO L87 Difference]: Start difference. First operand 1320 states and 1458 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:38,917 INFO L93 Difference]: Finished difference Result 1326 states and 1463 transitions. [2022-04-06 10:36:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 10:36:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:38,924 INFO L225 Difference]: With dead ends: 1326 [2022-04-06 10:36:38,924 INFO L226 Difference]: Without dead ends: 1302 [2022-04-06 10:36:38,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=305, Invalid=7005, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 10:36:38,954 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 199 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7381 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:38,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 326 Invalid, 7425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7381 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 10:36:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-04-06 10:36:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2022-04-06 10:36:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1152 states have (on average 1.1180555555555556) internal successors, (1288), 1246 states have internal predecessors, (1288), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2022-04-06 10:36:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1438 transitions. [2022-04-06 10:36:39,535 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1438 transitions. Word has length 61 [2022-04-06 10:36:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:39,535 INFO L478 AbstractCegarLoop]: Abstraction has 1302 states and 1438 transitions. [2022-04-06 10:36:39,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1438 transitions. [2022-04-06 10:36:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:39,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:39,545 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:36:39,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 10:36:39,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 10:36:39,746 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash 998576327, now seen corresponding path program 106 times [2022-04-06 10:36:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574118906] [2022-04-06 10:36:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:39,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:40,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:36:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574118906] [2022-04-06 10:36:40,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574118906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539506191] [2022-04-06 10:36:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:36:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:40,335 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:40,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 10:36:40,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:36:40,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:36:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:36:41,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:36:41,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539506191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:41,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:41,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 49 [2022-04-06 10:36:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202120855] [2022-04-06 10:36:41,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:41,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:41,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:41,403 INFO L87 Difference]: Start difference. First operand 1302 states and 1438 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:44,311 INFO L93 Difference]: Finished difference Result 1308 states and 1443 transitions. [2022-04-06 10:36:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:36:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:44,319 INFO L225 Difference]: With dead ends: 1308 [2022-04-06 10:36:44,320 INFO L226 Difference]: Without dead ends: 1282 [2022-04-06 10:36:44,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=6665, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 10:36:44,335 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 163 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5430 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:44,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 281 Invalid, 5472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5430 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 10:36:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-04-06 10:36:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1282. [2022-04-06 10:36:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1135 states have (on average 1.1180616740088105) internal successors, (1269), 1227 states have internal predecessors, (1269), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2022-04-06 10:36:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1416 transitions. [2022-04-06 10:36:44,892 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1416 transitions. Word has length 61 [2022-04-06 10:36:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:44,893 INFO L478 AbstractCegarLoop]: Abstraction has 1282 states and 1416 transitions. [2022-04-06 10:36:44,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1416 transitions. [2022-04-06 10:36:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:44,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:44,902 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2022-04-06 10:36:44,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 10:36:45,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 10:36:45,103 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1193071074, now seen corresponding path program 107 times [2022-04-06 10:36:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115233593] [2022-04-06 10:36:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:45,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:45,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:45,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:36:45,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:45,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115233593] [2022-04-06 10:36:45,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115233593] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:45,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073714106] [2022-04-06 10:36:45,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:36:45,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:45,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:45,662 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:45,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 10:36:45,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 10:36:45,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:36:45,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:36:46,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:36:46,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073714106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:46,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:46,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 49 [2022-04-06 10:36:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881522248] [2022-04-06 10:36:46,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:46,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2231, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:46,846 INFO L87 Difference]: Start difference. First operand 1282 states and 1416 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:49,415 INFO L93 Difference]: Finished difference Result 1288 states and 1421 transitions. [2022-04-06 10:36:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:36:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:49,421 INFO L225 Difference]: With dead ends: 1288 [2022-04-06 10:36:49,421 INFO L226 Difference]: Without dead ends: 1260 [2022-04-06 10:36:49,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=309, Invalid=6333, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 10:36:49,430 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4421 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:49,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 266 Invalid, 4461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4421 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 10:36:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-04-06 10:36:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2022-04-06 10:36:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1116 states have (on average 1.118279569892473) internal successors, (1248), 1206 states have internal predecessors, (1248), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2022-04-06 10:36:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1392 transitions. [2022-04-06 10:36:49,976 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1392 transitions. Word has length 61 [2022-04-06 10:36:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:49,976 INFO L478 AbstractCegarLoop]: Abstraction has 1260 states and 1392 transitions. [2022-04-06 10:36:49,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1392 transitions. [2022-04-06 10:36:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:49,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:49,986 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:36:50,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 10:36:50,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:50,187 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1708709159, now seen corresponding path program 108 times [2022-04-06 10:36:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:50,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337092908] [2022-04-06 10:36:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:50,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:50,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:50,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:36:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337092908] [2022-04-06 10:36:50,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337092908] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:50,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647773094] [2022-04-06 10:36:50,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:36:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:50,683 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:50,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 10:36:50,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:36:50,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:36:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:36:51,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:36:51,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647773094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:51,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:51,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 49 [2022-04-06 10:36:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001886897] [2022-04-06 10:36:51,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:51,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:51,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:51,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:51,798 INFO L87 Difference]: Start difference. First operand 1260 states and 1392 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:53,853 INFO L93 Difference]: Finished difference Result 1266 states and 1397 transitions. [2022-04-06 10:36:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:36:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:53,859 INFO L225 Difference]: With dead ends: 1266 [2022-04-06 10:36:53,859 INFO L226 Difference]: Without dead ends: 1236 [2022-04-06 10:36:53,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=311, Invalid=6009, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 10:36:53,868 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:53,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 231 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 10:36:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-04-06 10:36:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-04-06 10:36:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1095 states have (on average 1.1187214611872147) internal successors, (1225), 1183 states have internal predecessors, (1225), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2022-04-06 10:36:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1366 transitions. [2022-04-06 10:36:54,429 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1366 transitions. Word has length 61 [2022-04-06 10:36:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:54,429 INFO L478 AbstractCegarLoop]: Abstraction has 1236 states and 1366 transitions. [2022-04-06 10:36:54,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1366 transitions. [2022-04-06 10:36:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 10:36:54,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:54,439 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2022-04-06 10:36:54,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 10:36:54,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:54,639 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 751401346, now seen corresponding path program 109 times [2022-04-06 10:36:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101987116] [2022-04-06 10:36:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:54,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:36:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:55,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101987116] [2022-04-06 10:36:55,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101987116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:55,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223619260] [2022-04-06 10:36:55,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:36:55,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:55,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:55,091 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:55,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 10:36:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 10:36:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:36:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:36:55,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:36:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:36:56,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223619260] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:36:56,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:36:56,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 49 [2022-04-06 10:36:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373915717] [2022-04-06 10:36:56,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:36:56,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 10:36:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:36:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 10:36:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:36:56,239 INFO L87 Difference]: Start difference. First operand 1236 states and 1366 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:36:57,927 INFO L93 Difference]: Finished difference Result 1254 states and 1387 transitions. [2022-04-06 10:36:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 10:36:57,928 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-04-06 10:36:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:36:57,936 INFO L225 Difference]: With dead ends: 1254 [2022-04-06 10:36:57,936 INFO L226 Difference]: Without dead ends: 1248 [2022-04-06 10:36:57,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=313, Invalid=5693, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 10:36:57,945 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:36:57,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 216 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:36:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-04-06 10:36:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1246. [2022-04-06 10:36:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1102 states have (on average 1.1197822141560798) internal successors, (1234), 1192 states have internal predecessors, (1234), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2022-04-06 10:36:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1379 transitions. [2022-04-06 10:36:58,480 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1379 transitions. Word has length 61 [2022-04-06 10:36:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:36:58,481 INFO L478 AbstractCegarLoop]: Abstraction has 1246 states and 1379 transitions. [2022-04-06 10:36:58,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:36:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1379 transitions. [2022-04-06 10:36:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 10:36:58,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:36:58,491 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 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] [2022-04-06 10:36:58,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 10:36:58,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-04-06 10:36:58,692 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:36:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:36:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -30593635, now seen corresponding path program 110 times [2022-04-06 10:36:58,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:36:58,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317442228] [2022-04-06 10:36:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:36:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:36:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:36:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:58,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:36:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:36:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:36:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:36:59,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:36:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317442228] [2022-04-06 10:36:59,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317442228] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:36:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484580083] [2022-04-06 10:36:59,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:36:59,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:36:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:36:59,321 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:36:59,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 10:36:59,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:36:59,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:36:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 10:36:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:37:00,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:37:02,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484580083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:02,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:02,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-04-06 10:37:02,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340665847] [2022-04-06 10:37:02,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:02,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 10:37:02,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 10:37:02,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 10:37:02,343 INFO L87 Difference]: Start difference. First operand 1246 states and 1379 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:37:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:10,971 INFO L93 Difference]: Finished difference Result 1392 states and 1550 transitions. [2022-04-06 10:37:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 10:37:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-06 10:37:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:10,992 INFO L225 Difference]: With dead ends: 1392 [2022-04-06 10:37:10,993 INFO L226 Difference]: Without dead ends: 1378 [2022-04-06 10:37:11,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 10:37:11,004 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 2415 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 11131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 11387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 11131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:11,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2420 Valid, 411 Invalid, 11387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 11131 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 10:37:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-04-06 10:37:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1369. [2022-04-06 10:37:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1210 states have (on average 1.1190082644628099) internal successors, (1354), 1310 states have internal predecessors, (1354), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2022-04-06 10:37:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1519 transitions. [2022-04-06 10:37:11,635 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1519 transitions. Word has length 62 [2022-04-06 10:37:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:11,635 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 1519 transitions. [2022-04-06 10:37:11,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:37:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1519 transitions. [2022-04-06 10:37:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 10:37:11,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:11,646 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 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] [2022-04-06 10:37:11,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 10:37:11,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:11,847 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1067812499, now seen corresponding path program 111 times [2022-04-06 10:37:11,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:11,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848453722] [2022-04-06 10:37:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:11,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:11,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:12,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:37:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:37:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848453722] [2022-04-06 10:37:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848453722] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413427709] [2022-04-06 10:37:12,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:37:12,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:12,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:12,513 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 10:37:12,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-06 10:37:12,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:37:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 10:37:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:37:13,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:37:15,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413427709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:15,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:15,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-04-06 10:37:15,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078853589] [2022-04-06 10:37:15,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:15,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 10:37:15,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:15,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 10:37:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 10:37:15,581 INFO L87 Difference]: Start difference. First operand 1369 states and 1519 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:37:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:23,998 INFO L93 Difference]: Finished difference Result 1384 states and 1534 transitions. [2022-04-06 10:37:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 10:37:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-04-06 10:37:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:24,008 INFO L225 Difference]: With dead ends: 1384 [2022-04-06 10:37:24,009 INFO L226 Difference]: Without dead ends: 1372 [2022-04-06 10:37:24,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 10:37:24,022 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 2378 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10526 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 10757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 10526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:24,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2405 Valid, 393 Invalid, 10757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 10526 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 10:37:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-04-06 10:37:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1370. [2022-04-06 10:37:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1211 states have (on average 1.1189099917423617) internal successors, (1355), 1311 states have internal predecessors, (1355), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-06 10:37:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1514 transitions. [2022-04-06 10:37:24,693 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1514 transitions. Word has length 62 [2022-04-06 10:37:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:24,693 INFO L478 AbstractCegarLoop]: Abstraction has 1370 states and 1514 transitions. [2022-04-06 10:37:24,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:37:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1514 transitions. [2022-04-06 10:37:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 10:37:24,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:24,705 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 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] [2022-04-06 10:37:24,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 10:37:24,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:24,906 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1733958171, now seen corresponding path program 112 times [2022-04-06 10:37:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:24,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305587440] [2022-04-06 10:37:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:24,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:24,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:37:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:37:25,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305587440] [2022-04-06 10:37:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305587440] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507709094] [2022-04-06 10:37:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:37:25,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:25,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:25,058 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:25,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 10:37:25,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:37:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:37:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 10:37:25,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:37:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:37:25,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507709094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:25,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:25,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-04-06 10:37:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838327436] [2022-04-06 10:37:25,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:25,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 10:37:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 10:37:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:37:25,450 INFO L87 Difference]: Start difference. First operand 1370 states and 1514 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:37:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:26,991 INFO L93 Difference]: Finished difference Result 1616 states and 1803 transitions. [2022-04-06 10:37:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 10:37:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-04-06 10:37:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:27,001 INFO L225 Difference]: With dead ends: 1616 [2022-04-06 10:37:27,001 INFO L226 Difference]: Without dead ends: 1554 [2022-04-06 10:37:27,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 10:37:27,016 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:27,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 103 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:37:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-04-06 10:37:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1512. [2022-04-06 10:37:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1353 states have (on average 1.1175166297117516) internal successors, (1512), 1453 states have internal predecessors, (1512), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-06 10:37:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1671 transitions. [2022-04-06 10:37:27,781 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1671 transitions. Word has length 62 [2022-04-06 10:37:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:27,781 INFO L478 AbstractCegarLoop]: Abstraction has 1512 states and 1671 transitions. [2022-04-06 10:37:27,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:37:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1671 transitions. [2022-04-06 10:37:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 10:37:27,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:27,796 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 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] [2022-04-06 10:37:27,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-06 10:37:27,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-04-06 10:37:27,997 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1463773098, now seen corresponding path program 113 times [2022-04-06 10:37:27,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:27,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090767181] [2022-04-06 10:37:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:27,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:28,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:28,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:37:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:37:28,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090767181] [2022-04-06 10:37:28,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090767181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:28,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614132138] [2022-04-06 10:37:28,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:37:28,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:28,127 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:28,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 10:37:28,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:37:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:37:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 10:37:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:37:28,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 10:37:28,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614132138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:28,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:28,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-04-06 10:37:28,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058055277] [2022-04-06 10:37:28,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:28,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 10:37:28,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 10:37:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-06 10:37:28,523 INFO L87 Difference]: Start difference. First operand 1512 states and 1671 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:30,164 INFO L93 Difference]: Finished difference Result 2555 states and 2807 transitions. [2022-04-06 10:37:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 10:37:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-04-06 10:37:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:30,200 INFO L225 Difference]: With dead ends: 2555 [2022-04-06 10:37:30,200 INFO L226 Difference]: Without dead ends: 1696 [2022-04-06 10:37:30,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 10:37:30,217 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:30,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:37:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-04-06 10:37:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1654. [2022-04-06 10:37:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-04-06 10:37:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1828 transitions. [2022-04-06 10:37:31,060 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1828 transitions. Word has length 62 [2022-04-06 10:37:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:31,060 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1828 transitions. [2022-04-06 10:37:31,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1828 transitions. [2022-04-06 10:37:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:37:31,081 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:31,081 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 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] [2022-04-06 10:37:31,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-04-06 10:37:31,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:31,282 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash 611823564, now seen corresponding path program 114 times [2022-04-06 10:37:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:31,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702463586] [2022-04-06 10:37:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:31,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:31,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:31,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:37:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:37:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702463586] [2022-04-06 10:37:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702463586] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659709588] [2022-04-06 10:37:32,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:37:32,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:32,128 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 10:37:32,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 10:37:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:37:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 10:37:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:37:32,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:37:32,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659709588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:32,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:32,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 51 [2022-04-06 10:37:32,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841133147] [2022-04-06 10:37:32,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:32,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:37:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:37:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2441, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:37:32,936 INFO L87 Difference]: Start difference. First operand 1654 states and 1828 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:38,082 INFO L93 Difference]: Finished difference Result 1824 states and 2017 transitions. [2022-04-06 10:37:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 10:37:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:37:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:38,096 INFO L225 Difference]: With dead ends: 1824 [2022-04-06 10:37:38,096 INFO L226 Difference]: Without dead ends: 1818 [2022-04-06 10:37:38,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=313, Invalid=8429, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 10:37:38,111 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 337 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 11002 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 11068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 11002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:38,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 385 Invalid, 11068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 11002 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 10:37:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-04-06 10:37:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1670. [2022-04-06 10:37:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1508 states have (on average 1.1167108753315649) internal successors, (1684), 1610 states have internal predecessors, (1684), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2022-04-06 10:37:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 1847 transitions. [2022-04-06 10:37:39,057 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 1847 transitions. Word has length 63 [2022-04-06 10:37:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:39,057 INFO L478 AbstractCegarLoop]: Abstraction has 1670 states and 1847 transitions. [2022-04-06 10:37:39,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 1847 transitions. [2022-04-06 10:37:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:37:39,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:39,074 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 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, 1, 1, 1, 1] [2022-04-06 10:37:39,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 10:37:39,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 10:37:39,275 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2009970889, now seen corresponding path program 115 times [2022-04-06 10:37:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:39,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971604896] [2022-04-06 10:37:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:39,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:39,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:39,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:39,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:37:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:37:40,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971604896] [2022-04-06 10:37:40,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971604896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436076655] [2022-04-06 10:37:40,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:37:40,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:40,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:40,070 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:40,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 10:37:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 10:37:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:37:40,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:37:41,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436076655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:41,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:41,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 51 [2022-04-06 10:37:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625935546] [2022-04-06 10:37:41,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:41,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:37:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:37:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2437, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:37:41,033 INFO L87 Difference]: Start difference. First operand 1670 states and 1847 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:45,492 INFO L93 Difference]: Finished difference Result 1676 states and 1852 transitions. [2022-04-06 10:37:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 10:37:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:37:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:45,505 INFO L225 Difference]: With dead ends: 1676 [2022-04-06 10:37:45,505 INFO L226 Difference]: Without dead ends: 1654 [2022-04-06 10:37:45,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=315, Invalid=8057, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 10:37:45,524 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 259 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9011 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 9059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 9011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:45,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 350 Invalid, 9059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 9011 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 10:37:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-04-06 10:37:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1654. [2022-04-06 10:37:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-04-06 10:37:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1829 transitions. [2022-04-06 10:37:46,446 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1829 transitions. Word has length 63 [2022-04-06 10:37:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:46,446 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1829 transitions. [2022-04-06 10:37:46,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1829 transitions. [2022-04-06 10:37:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:37:46,462 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:46,462 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:37:46,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-04-06 10:37:46,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 10:37:46,663 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash -513799892, now seen corresponding path program 116 times [2022-04-06 10:37:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146091713] [2022-04-06 10:37:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:37:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:37:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:47,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146091713] [2022-04-06 10:37:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146091713] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:47,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540470447] [2022-04-06 10:37:47,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:37:47,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:47,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:47,358 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:47,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 10:37:47,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:37:47,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:37:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 10:37:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:37:48,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:37:48,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540470447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:48,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:48,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 51 [2022-04-06 10:37:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125537952] [2022-04-06 10:37:48,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:48,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:37:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:37:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:37:48,402 INFO L87 Difference]: Start difference. First operand 1654 states and 1829 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:52,433 INFO L93 Difference]: Finished difference Result 1660 states and 1834 transitions. [2022-04-06 10:37:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 10:37:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:37:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:52,446 INFO L225 Difference]: With dead ends: 1660 [2022-04-06 10:37:52,446 INFO L226 Difference]: Without dead ends: 1636 [2022-04-06 10:37:52,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=317, Invalid=7693, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 10:37:52,461 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 223 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7766 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:52,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 330 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7766 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 10:37:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-04-06 10:37:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2022-04-06 10:37:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1480 states have (on average 1.1162162162162161) internal successors, (1652), 1578 states have internal predecessors, (1652), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2022-04-06 10:37:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1809 transitions. [2022-04-06 10:37:53,295 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1809 transitions. Word has length 63 [2022-04-06 10:37:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:53,295 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1809 transitions. [2022-04-06 10:37:53,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1809 transitions. [2022-04-06 10:37:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:37:53,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:53,311 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:37:53,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 10:37:53,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 10:37:53,511 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -369649193, now seen corresponding path program 117 times [2022-04-06 10:37:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181010931] [2022-04-06 10:37:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:53,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:53,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:53,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:37:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:37:54,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:37:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181010931] [2022-04-06 10:37:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181010931] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:37:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529605615] [2022-04-06 10:37:54,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:37:54,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:54,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:37:54,160 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:37:54,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 10:37:54,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 10:37:54,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:37:54,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 10:37:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:37:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:37:54,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:37:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:37:55,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529605615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:37:55,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:37:55,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 51 [2022-04-06 10:37:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223724021] [2022-04-06 10:37:55,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:37:55,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:37:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:37:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:37:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2429, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:37:55,269 INFO L87 Difference]: Start difference. First operand 1636 states and 1809 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:37:58,674 INFO L93 Difference]: Finished difference Result 1642 states and 1814 transitions. [2022-04-06 10:37:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 10:37:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:37:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:37:58,682 INFO L225 Difference]: With dead ends: 1642 [2022-04-06 10:37:58,682 INFO L226 Difference]: Without dead ends: 1616 [2022-04-06 10:37:58,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=319, Invalid=7337, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 10:37:58,696 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 187 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6084 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 6130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:37:58,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 295 Invalid, 6130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6084 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 10:37:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-04-06 10:37:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1616. [2022-04-06 10:37:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1463 states have (on average 1.1161995898838004) internal successors, (1633), 1559 states have internal predecessors, (1633), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2022-04-06 10:37:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 1787 transitions. [2022-04-06 10:37:59,557 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 1787 transitions. Word has length 63 [2022-04-06 10:37:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:37:59,557 INFO L478 AbstractCegarLoop]: Abstraction has 1616 states and 1787 transitions. [2022-04-06 10:37:59,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:37:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 1787 transitions. [2022-04-06 10:37:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:37:59,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:37:59,572 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2022-04-06 10:37:59,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 10:37:59,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:37:59,773 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:37:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:37:59,774 INFO L85 PathProgramCache]: Analyzing trace with hash 944933516, now seen corresponding path program 118 times [2022-04-06 10:37:59,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:37:59,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008491088] [2022-04-06 10:37:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:37:59,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:37:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:37:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:37:59,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:37:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:00,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:38:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:38:00,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008491088] [2022-04-06 10:38:00,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008491088] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022817336] [2022-04-06 10:38:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:38:00,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:00,375 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:00,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 10:38:00,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:38:00,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:38:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:38:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:38:01,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:38:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022817336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:01,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:01,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 51 [2022-04-06 10:38:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646169302] [2022-04-06 10:38:01,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:01,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:38:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:38:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2425, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:38:01,486 INFO L87 Difference]: Start difference. First operand 1616 states and 1787 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:38:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:04,595 INFO L93 Difference]: Finished difference Result 1622 states and 1792 transitions. [2022-04-06 10:38:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:38:04,596 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:38:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:04,604 INFO L225 Difference]: With dead ends: 1622 [2022-04-06 10:38:04,604 INFO L226 Difference]: Without dead ends: 1594 [2022-04-06 10:38:04,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=321, Invalid=6989, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 10:38:04,619 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 150 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 5312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:04,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 290 Invalid, 5312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 10:38:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-04-06 10:38:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2022-04-06 10:38:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1444 states have (on average 1.1163434903047091) internal successors, (1612), 1538 states have internal predecessors, (1612), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2022-04-06 10:38:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1763 transitions. [2022-04-06 10:38:05,461 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1763 transitions. Word has length 63 [2022-04-06 10:38:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:38:05,461 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 1763 transitions. [2022-04-06 10:38:05,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:38:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1763 transitions. [2022-04-06 10:38:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:38:05,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:38:05,475 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:38:05,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-04-06 10:38:05,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-06 10:38:05,679 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:38:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:38:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -107494281, now seen corresponding path program 119 times [2022-04-06 10:38:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:38:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50802921] [2022-04-06 10:38:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:38:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:38:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:05,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:38:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:05,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:38:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:38:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:38:06,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:06,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50802921] [2022-04-06 10:38:06,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50802921] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:06,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449323500] [2022-04-06 10:38:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:38:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:06,261 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:06,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 10:38:06,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 10:38:06,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:38:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:38:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:38:07,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:38:07,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449323500] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:07,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:07,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2022-04-06 10:38:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698941646] [2022-04-06 10:38:07,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:07,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:38:07,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:38:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2421, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:38:07,421 INFO L87 Difference]: Start difference. First operand 1594 states and 1763 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:38:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:10,000 INFO L93 Difference]: Finished difference Result 1600 states and 1768 transitions. [2022-04-06 10:38:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:38:10,000 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:38:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:10,011 INFO L225 Difference]: With dead ends: 1600 [2022-04-06 10:38:10,011 INFO L226 Difference]: Without dead ends: 1570 [2022-04-06 10:38:10,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=323, Invalid=6649, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 10:38:10,028 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3693 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:10,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 250 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3693 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:38:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-04-06 10:38:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-04-06 10:38:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1423 states have (on average 1.1166549543218551) internal successors, (1589), 1515 states have internal predecessors, (1589), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2022-04-06 10:38:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1737 transitions. [2022-04-06 10:38:10,968 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1737 transitions. Word has length 63 [2022-04-06 10:38:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:38:10,968 INFO L478 AbstractCegarLoop]: Abstraction has 1570 states and 1737 transitions. [2022-04-06 10:38:10,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:38:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1737 transitions. [2022-04-06 10:38:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:38:10,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:38:10,981 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 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] [2022-04-06 10:38:10,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-04-06 10:38:11,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 10:38:11,182 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:38:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:38:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1754472230, now seen corresponding path program 120 times [2022-04-06 10:38:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:38:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17536457] [2022-04-06 10:38:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:38:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:38:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:11,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:38:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:11,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:38:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:11,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 10:38:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 10:38:11,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17536457] [2022-04-06 10:38:11,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17536457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999944995] [2022-04-06 10:38:11,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:38:11,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:11,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:11,536 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:11,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 10:38:11,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 10:38:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:38:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 10:38:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 10:38:12,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 10:38:12,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999944995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:12,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:12,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-04-06 10:38:12,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587690254] [2022-04-06 10:38:12,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:12,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 10:38:12,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 10:38:12,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 10:38:12,977 INFO L87 Difference]: Start difference. First operand 1570 states and 1737 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:16,929 INFO L93 Difference]: Finished difference Result 1690 states and 1883 transitions. [2022-04-06 10:38:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 10:38:16,930 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 10:38:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:16,970 INFO L225 Difference]: With dead ends: 1690 [2022-04-06 10:38:16,970 INFO L226 Difference]: Without dead ends: 1670 [2022-04-06 10:38:16,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 10:38:16,986 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 848 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:16,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 274 Invalid, 5043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 10:38:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-04-06 10:38:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1665. [2022-04-06 10:38:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1479 states have (on average 1.1115618661257607) internal successors, (1644), 1597 states have internal predecessors, (1644), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-04-06 10:38:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1844 transitions. [2022-04-06 10:38:17,823 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1844 transitions. Word has length 63 [2022-04-06 10:38:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:38:17,823 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1844 transitions. [2022-04-06 10:38:17,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1844 transitions. [2022-04-06 10:38:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:38:17,840 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:38:17,840 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2022-04-06 10:38:17,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 10:38:18,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 10:38:18,041 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:38:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:38:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1109734380, now seen corresponding path program 121 times [2022-04-06 10:38:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:38:18,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132221273] [2022-04-06 10:38:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:38:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:38:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:38:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:38:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:38:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:38:18,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132221273] [2022-04-06 10:38:18,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132221273] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114656410] [2022-04-06 10:38:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:38:18,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:18,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:18,542 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:18,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 10:38:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:38:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:38:19,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:38:19,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114656410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:19,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:19,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 51 [2022-04-06 10:38:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643735899] [2022-04-06 10:38:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:19,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 10:38:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 10:38:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 10:38:19,748 INFO L87 Difference]: Start difference. First operand 1665 states and 1844 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:38:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:21,996 INFO L93 Difference]: Finished difference Result 1683 states and 1866 transitions. [2022-04-06 10:38:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:38:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-04-06 10:38:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:22,008 INFO L225 Difference]: With dead ends: 1683 [2022-04-06 10:38:22,009 INFO L226 Difference]: Without dead ends: 1663 [2022-04-06 10:38:22,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=6317, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 10:38:22,024 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:22,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 228 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 10:38:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-04-06 10:38:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1658. [2022-04-06 10:38:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1472 states have (on average 1.1127717391304348) internal successors, (1638), 1590 states have internal predecessors, (1638), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-04-06 10:38:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 1838 transitions. [2022-04-06 10:38:22,843 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 1838 transitions. Word has length 63 [2022-04-06 10:38:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:38:22,843 INFO L478 AbstractCegarLoop]: Abstraction has 1658 states and 1838 transitions. [2022-04-06 10:38:22,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:38:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 1838 transitions. [2022-04-06 10:38:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 10:38:22,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:38:22,860 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 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] [2022-04-06 10:38:22,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 10:38:23,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:23,061 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:38:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:38:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1079484753, now seen corresponding path program 122 times [2022-04-06 10:38:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:38:23,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768932756] [2022-04-06 10:38:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:38:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:38:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:38:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:23,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:38:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:23,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:38:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 10:38:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768932756] [2022-04-06 10:38:23,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768932756] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533448298] [2022-04-06 10:38:23,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:38:23,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:23,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:23,421 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:23,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 10:38:23,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:38:23,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:38:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 10:38:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 10:38:24,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 10:38:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533448298] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:24,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-04-06 10:38:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022835365] [2022-04-06 10:38:24,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:24,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 10:38:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 10:38:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 10:38:24,868 INFO L87 Difference]: Start difference. First operand 1658 states and 1838 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:28,639 INFO L93 Difference]: Finished difference Result 1672 states and 1851 transitions. [2022-04-06 10:38:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 10:38:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-06 10:38:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:28,648 INFO L225 Difference]: With dead ends: 1672 [2022-04-06 10:38:28,648 INFO L226 Difference]: Without dead ends: 1642 [2022-04-06 10:38:28,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 10:38:28,663 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 1146 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4441 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 4441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:28,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 252 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 4441 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 10:38:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-04-06 10:38:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2022-04-06 10:38:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1454 states have (on average 1.1127922971114168) internal successors, (1618), 1572 states have internal predecessors, (1618), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (124), 62 states have call predecessors, (124), 62 states have call successors, (124) [2022-04-06 10:38:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1806 transitions. [2022-04-06 10:38:29,480 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1806 transitions. Word has length 63 [2022-04-06 10:38:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:38:29,480 INFO L478 AbstractCegarLoop]: Abstraction has 1640 states and 1806 transitions. [2022-04-06 10:38:29,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1806 transitions. [2022-04-06 10:38:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 10:38:29,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:38:29,497 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 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] [2022-04-06 10:38:29,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 10:38:29,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:29,698 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:38:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:38:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash -638931533, now seen corresponding path program 123 times [2022-04-06 10:38:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:38:29,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688476167] [2022-04-06 10:38:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:38:29,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:38:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:38:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:29,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:38:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:38:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:38:30,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688476167] [2022-04-06 10:38:30,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688476167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804538158] [2022-04-06 10:38:30,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:38:30,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:30,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:30,440 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:30,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 10:38:30,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-06 10:38:30,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:38:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 10:38:30,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:38:31,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:38:33,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804538158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:33,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:33,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-04-06 10:38:33,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122008847] [2022-04-06 10:38:33,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:33,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 10:38:33,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 10:38:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 10:38:33,821 INFO L87 Difference]: Start difference. First operand 1640 states and 1806 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:43,858 INFO L93 Difference]: Finished difference Result 1814 states and 2009 transitions. [2022-04-06 10:38:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 10:38:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-06 10:38:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:43,889 INFO L225 Difference]: With dead ends: 1814 [2022-04-06 10:38:43,889 INFO L226 Difference]: Without dead ends: 1800 [2022-04-06 10:38:43,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 10:38:43,908 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 2708 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12532 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 12821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 12532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:43,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2713 Valid, 426 Invalid, 12821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 12532 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 10:38:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-04-06 10:38:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1791. [2022-04-06 10:38:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1587 states have (on average 1.1121613106490233) internal successors, (1765), 1717 states have internal predecessors, (1765), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (142), 68 states have call predecessors, (142), 68 states have call successors, (142) [2022-04-06 10:38:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 1977 transitions. [2022-04-06 10:38:44,837 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 1977 transitions. Word has length 64 [2022-04-06 10:38:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:38:44,837 INFO L478 AbstractCegarLoop]: Abstraction has 1791 states and 1977 transitions. [2022-04-06 10:38:44,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 1977 transitions. [2022-04-06 10:38:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 10:38:44,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:38:44,855 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 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] [2022-04-06 10:38:44,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-04-06 10:38:45,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:45,056 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:38:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:38:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash -948079747, now seen corresponding path program 124 times [2022-04-06 10:38:45,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:38:45,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474658173] [2022-04-06 10:38:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:38:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:38:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:38:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:45,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:38:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:45,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:38:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:38:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:38:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:38:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474658173] [2022-04-06 10:38:45,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474658173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:38:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028403133] [2022-04-06 10:38:45,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:38:45,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:38:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:38:45,753 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:38:45,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 10:38:45,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:38:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:38:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 10:38:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:38:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:38:47,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:38:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:38:49,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028403133] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:38:49,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:38:49,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-04-06 10:38:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343388167] [2022-04-06 10:38:49,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:38:49,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 10:38:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:38:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 10:38:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 10:38:49,227 INFO L87 Difference]: Start difference. First operand 1791 states and 1977 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:38:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:38:59,314 INFO L93 Difference]: Finished difference Result 1806 states and 1992 transitions. [2022-04-06 10:38:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 10:38:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-04-06 10:38:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:38:59,325 INFO L225 Difference]: With dead ends: 1806 [2022-04-06 10:38:59,325 INFO L226 Difference]: Without dead ends: 1794 [2022-04-06 10:38:59,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 10:38:59,344 INFO L913 BasicCegarLoop]: 166 mSDtfsCounter, 2720 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12536 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 12798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 12536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:38:59,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 428 Invalid, 12798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 12536 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 10:38:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-04-06 10:39:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2022-04-06 10:39:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1588 states have (on average 1.1120906801007557) internal successors, (1766), 1718 states have internal predecessors, (1766), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-04-06 10:39:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 1971 transitions. [2022-04-06 10:39:00,312 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 1971 transitions. Word has length 64 [2022-04-06 10:39:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:00,312 INFO L478 AbstractCegarLoop]: Abstraction has 1792 states and 1971 transitions. [2022-04-06 10:39:00,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:39:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 1971 transitions. [2022-04-06 10:39:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 10:39:00,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:00,333 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 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] [2022-04-06 10:39:00,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-06 10:39:00,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-06 10:39:00,534 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1568531873, now seen corresponding path program 125 times [2022-04-06 10:39:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:00,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957512994] [2022-04-06 10:39:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:00,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:00,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 10:39:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:39:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957512994] [2022-04-06 10:39:00,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957512994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683332595] [2022-04-06 10:39:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:39:00,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:00,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:00,682 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:00,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 10:39:00,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:39:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 10:39:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:39:01,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:39:01,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683332595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:01,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:01,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-04-06 10:39:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516959400] [2022-04-06 10:39:01,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:01,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 10:39:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 10:39:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-04-06 10:39:01,126 INFO L87 Difference]: Start difference. First operand 1792 states and 1971 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:02,878 INFO L93 Difference]: Finished difference Result 2699 states and 2926 transitions. [2022-04-06 10:39:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 10:39:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2022-04-06 10:39:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:02,918 INFO L225 Difference]: With dead ends: 2699 [2022-04-06 10:39:02,918 INFO L226 Difference]: Without dead ends: 1795 [2022-04-06 10:39:02,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 10:39:02,941 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 109 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:02,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 102 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:39:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-04-06 10:39:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1787. [2022-04-06 10:39:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1589 states have (on average 1.1095028319697924) internal successors, (1763), 1715 states have internal predecessors, (1763), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-04-06 10:39:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 1960 transitions. [2022-04-06 10:39:03,907 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 1960 transitions. Word has length 64 [2022-04-06 10:39:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:03,907 INFO L478 AbstractCegarLoop]: Abstraction has 1787 states and 1960 transitions. [2022-04-06 10:39:03,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 1960 transitions. [2022-04-06 10:39:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 10:39:03,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:03,927 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 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] [2022-04-06 10:39:03,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-04-06 10:39:04,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 10:39:04,127 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1794187094, now seen corresponding path program 126 times [2022-04-06 10:39:04,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146428189] [2022-04-06 10:39:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:04,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:04,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:04,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:39:04,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146428189] [2022-04-06 10:39:04,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146428189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196550167] [2022-04-06 10:39:04,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:39:04,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:04,268 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:04,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 10:39:04,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 10:39:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 10:39:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:39:04,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:39:04,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196550167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:04,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:04,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-04-06 10:39:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646354022] [2022-04-06 10:39:04,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:04,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 10:39:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 10:39:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-04-06 10:39:04,715 INFO L87 Difference]: Start difference. First operand 1787 states and 1960 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:39:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:06,419 INFO L93 Difference]: Finished difference Result 1853 states and 2040 transitions. [2022-04-06 10:39:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 10:39:06,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-04-06 10:39:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:06,429 INFO L225 Difference]: With dead ends: 1853 [2022-04-06 10:39:06,429 INFO L226 Difference]: Without dead ends: 1802 [2022-04-06 10:39:06,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 10:39:06,448 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 121 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:06,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 97 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:39:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-04-06 10:39:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-04-06 10:39:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-04-06 10:39:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1975 transitions. [2022-04-06 10:39:07,462 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1975 transitions. Word has length 64 [2022-04-06 10:39:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:07,462 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1975 transitions. [2022-04-06 10:39:07,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:39:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1975 transitions. [2022-04-06 10:39:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:07,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:07,481 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 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] [2022-04-06 10:39:07,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-04-06 10:39:07,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 10:39:07,681 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1751293918, now seen corresponding path program 127 times [2022-04-06 10:39:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:07,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755403708] [2022-04-06 10:39:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:07,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:07,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:08,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:39:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755403708] [2022-04-06 10:39:08,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755403708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501581073] [2022-04-06 10:39:08,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:39:08,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:08,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:08,552 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:08,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 10:39:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 10:39:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:39:09,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:39:09,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501581073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:09,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:09,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 53 [2022-04-06 10:39:09,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816080908] [2022-04-06 10:39:09,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:09,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:09,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2643, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:09,388 INFO L87 Difference]: Start difference. First operand 1802 states and 1975 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:15,062 INFO L93 Difference]: Finished difference Result 1980 states and 2172 transitions. [2022-04-06 10:39:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 10:39:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:15,079 INFO L225 Difference]: With dead ends: 1980 [2022-04-06 10:39:15,079 INFO L226 Difference]: Without dead ends: 1974 [2022-04-06 10:39:15,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=325, Invalid=9181, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 10:39:15,100 INFO L913 BasicCegarLoop]: 166 mSDtfsCounter, 355 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12132 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 12202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 12132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:15,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 403 Invalid, 12202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 12132 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 10:39:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-04-06 10:39:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1818. [2022-04-06 10:39:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1617 states have (on average 1.1088435374149659) internal successors, (1793), 1745 states have internal predecessors, (1793), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (132), 67 states have call predecessors, (132), 67 states have call successors, (132) [2022-04-06 10:39:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 1994 transitions. [2022-04-06 10:39:16,194 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 1994 transitions. Word has length 65 [2022-04-06 10:39:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:16,194 INFO L478 AbstractCegarLoop]: Abstraction has 1818 states and 1994 transitions. [2022-04-06 10:39:16,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 1994 transitions. [2022-04-06 10:39:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:16,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:16,215 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 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, 1, 1, 1, 1] [2022-04-06 10:39:16,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-04-06 10:39:16,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 10:39:16,416 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:16,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1821862311, now seen corresponding path program 128 times [2022-04-06 10:39:16,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:16,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962439412] [2022-04-06 10:39:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:16,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:16,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:16,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:16,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:39:17,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:17,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962439412] [2022-04-06 10:39:17,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962439412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:17,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921612374] [2022-04-06 10:39:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:39:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:17,245 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:17,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 10:39:17,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:39:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 10:39:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:39:17,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:39:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921612374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:18,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 53 [2022-04-06 10:39:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847222947] [2022-04-06 10:39:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:18,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:18,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:18,271 INFO L87 Difference]: Start difference. First operand 1818 states and 1994 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:23,422 INFO L93 Difference]: Finished difference Result 1824 states and 1999 transitions. [2022-04-06 10:39:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 10:39:23,422 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:23,432 INFO L225 Difference]: With dead ends: 1824 [2022-04-06 10:39:23,432 INFO L226 Difference]: Without dead ends: 1802 [2022-04-06 10:39:23,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=327, Invalid=8793, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 10:39:23,451 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 270 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 10689 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 10737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 10689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:23,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 381 Invalid, 10737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 10689 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 10:39:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-04-06 10:39:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-04-06 10:39:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (130), 66 states have call predecessors, (130), 66 states have call successors, (130) [2022-04-06 10:39:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1976 transitions. [2022-04-06 10:39:24,413 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1976 transitions. Word has length 65 [2022-04-06 10:39:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:24,413 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1976 transitions. [2022-04-06 10:39:24,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1976 transitions. [2022-04-06 10:39:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:24,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:24,432 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:39:24,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-04-06 10:39:24,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-04-06 10:39:24,633 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2021511230, now seen corresponding path program 129 times [2022-04-06 10:39:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:24,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181005027] [2022-04-06 10:39:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:24,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:39:25,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181005027] [2022-04-06 10:39:25,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181005027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151161888] [2022-04-06 10:39:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:39:25,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:25,395 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:25,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 10:39:25,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-06 10:39:25,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 10:39:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:39:26,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:39:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151161888] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:26,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:26,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 53 [2022-04-06 10:39:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376936181] [2022-04-06 10:39:26,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:26,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:26,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2635, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:26,468 INFO L87 Difference]: Start difference. First operand 1802 states and 1976 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:31,144 INFO L93 Difference]: Finished difference Result 1808 states and 1981 transitions. [2022-04-06 10:39:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 10:39:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:31,154 INFO L225 Difference]: With dead ends: 1808 [2022-04-06 10:39:31,154 INFO L226 Difference]: Without dead ends: 1784 [2022-04-06 10:39:31,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=329, Invalid=8413, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 10:39:31,173 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 234 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9348 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 9396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 9348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:31,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 361 Invalid, 9396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 9348 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 10:39:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-04-06 10:39:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1784. [2022-04-06 10:39:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1589 states have (on average 1.1082441787287602) internal successors, (1761), 1713 states have internal predecessors, (1761), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (128), 65 states have call predecessors, (128), 65 states have call successors, (128) [2022-04-06 10:39:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1956 transitions. [2022-04-06 10:39:32,125 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1956 transitions. Word has length 65 [2022-04-06 10:39:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:32,125 INFO L478 AbstractCegarLoop]: Abstraction has 1784 states and 1956 transitions. [2022-04-06 10:39:32,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1956 transitions. [2022-04-06 10:39:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:32,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:32,143 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:39:32,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 10:39:32,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 10:39:32,344 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash 383561223, now seen corresponding path program 130 times [2022-04-06 10:39:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714847586] [2022-04-06 10:39:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:32,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:32,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:32,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:39:33,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714847586] [2022-04-06 10:39:33,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714847586] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543976310] [2022-04-06 10:39:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:39:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:33,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:33,051 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:33,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 10:39:33,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:39:33,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 10:39:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:39:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:39:34,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543976310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:34,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:34,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 53 [2022-04-06 10:39:34,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674560431] [2022-04-06 10:39:34,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:34,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:34,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:34,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2631, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:34,193 INFO L87 Difference]: Start difference. First operand 1784 states and 1956 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:38,298 INFO L93 Difference]: Finished difference Result 1790 states and 1961 transitions. [2022-04-06 10:39:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 10:39:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:38,308 INFO L225 Difference]: With dead ends: 1790 [2022-04-06 10:39:38,308 INFO L226 Difference]: Without dead ends: 1764 [2022-04-06 10:39:38,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=331, Invalid=8041, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 10:39:38,328 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 198 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7476 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:38,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 326 Invalid, 7522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 7476 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 10:39:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-04-06 10:39:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2022-04-06 10:39:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1572 states have (on average 1.1081424936386768) internal successors, (1742), 1694 states have internal predecessors, (1742), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (126), 64 states have call predecessors, (126), 64 states have call successors, (126) [2022-04-06 10:39:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1934 transitions. [2022-04-06 10:39:39,268 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1934 transitions. Word has length 65 [2022-04-06 10:39:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:39,268 INFO L478 AbstractCegarLoop]: Abstraction has 1764 states and 1934 transitions. [2022-04-06 10:39:39,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1934 transitions. [2022-04-06 10:39:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:39,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:39,287 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 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] [2022-04-06 10:39:39,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 10:39:39,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:39,496 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2049878174, now seen corresponding path program 131 times [2022-04-06 10:39:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:39,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971895434] [2022-04-06 10:39:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:39,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:39,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:39,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:39:40,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:40,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971895434] [2022-04-06 10:39:40,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971895434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:40,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782049703] [2022-04-06 10:39:40,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:39:40,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:40,158 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:40,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 10:39:40,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:39:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 10:39:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:39:41,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:39:41,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782049703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:41,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:41,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 53 [2022-04-06 10:39:41,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753485944] [2022-04-06 10:39:41,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:41,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:41,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:41,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2627, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:41,344 INFO L87 Difference]: Start difference. First operand 1764 states and 1934 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:44,952 INFO L93 Difference]: Finished difference Result 1770 states and 1939 transitions. [2022-04-06 10:39:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 10:39:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:44,966 INFO L225 Difference]: With dead ends: 1770 [2022-04-06 10:39:44,966 INFO L226 Difference]: Without dead ends: 1742 [2022-04-06 10:39:44,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=333, Invalid=7677, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 10:39:44,990 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 162 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6081 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:44,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 301 Invalid, 6125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 10:39:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-04-06 10:39:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1742. [2022-04-06 10:39:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1553 states have (on average 1.1081777205408887) internal successors, (1721), 1673 states have internal predecessors, (1721), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (124), 63 states have call predecessors, (124), 63 states have call successors, (124) [2022-04-06 10:39:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 1910 transitions. [2022-04-06 10:39:45,980 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 1910 transitions. Word has length 65 [2022-04-06 10:39:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:45,980 INFO L478 AbstractCegarLoop]: Abstraction has 1742 states and 1910 transitions. [2022-04-06 10:39:45,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 1910 transitions. [2022-04-06 10:39:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:45,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:45,997 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2022-04-06 10:39:46,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 10:39:46,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:46,198 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:46,198 INFO L85 PathProgramCache]: Analyzing trace with hash -443901337, now seen corresponding path program 132 times [2022-04-06 10:39:46,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:46,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221863941] [2022-04-06 10:39:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:46,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:46,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:39:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:46,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221863941] [2022-04-06 10:39:46,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221863941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:46,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036999853] [2022-04-06 10:39:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:39:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:46,810 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:46,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 10:39:46,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:39:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:39:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:39:47,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:39:48,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036999853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:48,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:48,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 53 [2022-04-06 10:39:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485067849] [2022-04-06 10:39:48,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:48,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2623, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:48,049 INFO L87 Difference]: Start difference. First operand 1742 states and 1910 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:51,068 INFO L93 Difference]: Finished difference Result 1748 states and 1915 transitions. [2022-04-06 10:39:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:39:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:51,077 INFO L225 Difference]: With dead ends: 1748 [2022-04-06 10:39:51,077 INFO L226 Difference]: Without dead ends: 1718 [2022-04-06 10:39:51,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=335, Invalid=7321, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 10:39:51,095 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4305 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:51,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 256 Invalid, 4347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4305 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 10:39:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-04-06 10:39:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2022-04-06 10:39:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1532 states have (on average 1.108355091383812) internal successors, (1698), 1650 states have internal predecessors, (1698), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (122), 62 states have call predecessors, (122), 62 states have call successors, (122) [2022-04-06 10:39:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1884 transitions. [2022-04-06 10:39:52,017 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1884 transitions. Word has length 65 [2022-04-06 10:39:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:52,017 INFO L478 AbstractCegarLoop]: Abstraction has 1718 states and 1884 transitions. [2022-04-06 10:39:52,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1884 transitions. [2022-04-06 10:39:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:52,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:52,043 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:39:52,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-06 10:39:52,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:52,259 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1237002494, now seen corresponding path program 133 times [2022-04-06 10:39:52,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:52,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618231172] [2022-04-06 10:39:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:52,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:52,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:52,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:39:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:52,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618231172] [2022-04-06 10:39:52,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618231172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:52,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383764170] [2022-04-06 10:39:52,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:39:52,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:52,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:52,827 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:52,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 10:39:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:52,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:39:52,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:39:53,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:39:54,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383764170] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:54,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:54,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 53 [2022-04-06 10:39:54,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173365293] [2022-04-06 10:39:54,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:54,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:54,103 INFO L87 Difference]: Start difference. First operand 1718 states and 1884 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:39:56,828 INFO L93 Difference]: Finished difference Result 1724 states and 1889 transitions. [2022-04-06 10:39:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:39:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:39:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:39:56,837 INFO L225 Difference]: With dead ends: 1724 [2022-04-06 10:39:56,837 INFO L226 Difference]: Without dead ends: 1692 [2022-04-06 10:39:56,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=337, Invalid=6973, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 10:39:56,855 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3601 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:39:56,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 256 Invalid, 3641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 10:39:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-04-06 10:39:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2022-04-06 10:39:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1509 states have (on average 1.1086812458581843) internal successors, (1673), 1625 states have internal predecessors, (1673), 63 states have call successors, (63), 5 states have call predecessors, (63), 119 states have return successors, (120), 61 states have call predecessors, (120), 61 states have call successors, (120) [2022-04-06 10:39:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 1856 transitions. [2022-04-06 10:39:57,760 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 1856 transitions. Word has length 65 [2022-04-06 10:39:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:39:57,760 INFO L478 AbstractCegarLoop]: Abstraction has 1692 states and 1856 transitions. [2022-04-06 10:39:57,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:39:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 1856 transitions. [2022-04-06 10:39:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:39:57,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:39:57,777 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2022-04-06 10:39:57,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-04-06 10:39:57,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:57,977 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:39:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:39:57,978 INFO L85 PathProgramCache]: Analyzing trace with hash -299422009, now seen corresponding path program 134 times [2022-04-06 10:39:57,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:39:57,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478809418] [2022-04-06 10:39:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:39:57,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:39:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:58,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:39:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:39:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:39:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:39:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 10:39:58,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:39:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478809418] [2022-04-06 10:39:58,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478809418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:39:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271349155] [2022-04-06 10:39:58,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:39:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:39:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:39:58,485 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:39:58,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 10:39:58,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:39:58,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:39:58,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 10:39:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:39:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 10:39:59,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:39:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 10:39:59,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271349155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:39:59,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:39:59,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 53 [2022-04-06 10:39:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863934603] [2022-04-06 10:39:59,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:39:59,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 10:39:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:39:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 10:39:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 10:39:59,795 INFO L87 Difference]: Start difference. First operand 1692 states and 1856 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:40:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:01,874 INFO L93 Difference]: Finished difference Result 1710 states and 1877 transitions. [2022-04-06 10:40:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 10:40:01,875 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-04-06 10:40:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:01,889 INFO L225 Difference]: With dead ends: 1710 [2022-04-06 10:40:01,889 INFO L226 Difference]: Without dead ends: 1704 [2022-04-06 10:40:01,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=339, Invalid=6633, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 10:40:01,908 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:01,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 196 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:40:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-04-06 10:40:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1702. [2022-04-06 10:40:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1516 states have (on average 1.1094986807387863) internal successors, (1682), 1634 states have internal predecessors, (1682), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (123), 62 states have call predecessors, (123), 62 states have call successors, (123) [2022-04-06 10:40:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1869 transitions. [2022-04-06 10:40:02,868 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1869 transitions. Word has length 65 [2022-04-06 10:40:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:02,869 INFO L478 AbstractCegarLoop]: Abstraction has 1702 states and 1869 transitions. [2022-04-06 10:40:02,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:40:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1869 transitions. [2022-04-06 10:40:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 10:40:02,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:02,886 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 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] [2022-04-06 10:40:02,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-04-06 10:40:03,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:03,087 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -881129443, now seen corresponding path program 135 times [2022-04-06 10:40:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449788505] [2022-04-06 10:40:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:03,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:40:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:40:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:40:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:40:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:40:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449788505] [2022-04-06 10:40:03,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449788505] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:40:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44839951] [2022-04-06 10:40:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:40:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:03,857 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:03,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 10:40:03,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-06 10:40:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:40:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 10:40:03,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:40:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:40:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:40:07,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44839951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:40:07,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:40:07,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-04-06 10:40:07,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265179600] [2022-04-06 10:40:07,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:40:07,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 10:40:07,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:40:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 10:40:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 10:40:07,703 INFO L87 Difference]: Start difference. First operand 1702 states and 1869 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:40:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:19,505 INFO L93 Difference]: Finished difference Result 1878 states and 2074 transitions. [2022-04-06 10:40:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 10:40:19,505 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-06 10:40:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:19,541 INFO L225 Difference]: With dead ends: 1878 [2022-04-06 10:40:19,541 INFO L226 Difference]: Without dead ends: 1864 [2022-04-06 10:40:19,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 10:40:19,565 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 3049 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14660 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3054 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 14984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 14660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:19,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3054 Valid, 476 Invalid, 14984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 14660 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-04-06 10:40:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-04-06 10:40:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1855. [2022-04-06 10:40:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1651 states have (on average 1.1090248334342823) internal successors, (1831), 1781 states have internal predecessors, (1831), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (141), 68 states have call predecessors, (141), 68 states have call successors, (141) [2022-04-06 10:40:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2042 transitions. [2022-04-06 10:40:20,591 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2042 transitions. Word has length 66 [2022-04-06 10:40:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:20,591 INFO L478 AbstractCegarLoop]: Abstraction has 1855 states and 2042 transitions. [2022-04-06 10:40:20,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:40:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2042 transitions. [2022-04-06 10:40:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 10:40:20,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:20,611 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 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] [2022-04-06 10:40:20,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-04-06 10:40:20,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:20,811 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1874789485, now seen corresponding path program 136 times [2022-04-06 10:40:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:20,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133578914] [2022-04-06 10:40:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:20,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:40:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:40:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:21,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:40:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:40:21,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:40:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133578914] [2022-04-06 10:40:21,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133578914] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:40:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727627623] [2022-04-06 10:40:21,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:40:21,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:21,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:21,587 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:21,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 10:40:21,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:40:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:40:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 10:40:21,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:40:23,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:40:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:40:25,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727627623] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:40:25,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:40:25,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-04-06 10:40:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094455171] [2022-04-06 10:40:25,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:40:25,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 10:40:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:40:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 10:40:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 10:40:25,613 INFO L87 Difference]: Start difference. First operand 1855 states and 2042 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:40:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:37,493 INFO L93 Difference]: Finished difference Result 1870 states and 2057 transitions. [2022-04-06 10:40:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 10:40:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-04-06 10:40:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:37,504 INFO L225 Difference]: With dead ends: 1870 [2022-04-06 10:40:37,504 INFO L226 Difference]: Without dead ends: 1858 [2022-04-06 10:40:37,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 10:40:37,553 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 2999 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15424 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3030 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 15719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 15424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:37,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3030 Valid, 488 Invalid, 15719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 15424 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-06 10:40:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-04-06 10:40:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-04-06 10:40:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1652 states have (on average 1.1089588377723971) internal successors, (1832), 1782 states have internal predecessors, (1832), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-06 10:40:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2036 transitions. [2022-04-06 10:40:38,661 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2036 transitions. Word has length 66 [2022-04-06 10:40:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:38,661 INFO L478 AbstractCegarLoop]: Abstraction has 1856 states and 2036 transitions. [2022-04-06 10:40:38,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:40:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2036 transitions. [2022-04-06 10:40:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 10:40:38,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:38,682 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 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] [2022-04-06 10:40:38,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-04-06 10:40:38,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-04-06 10:40:38,883 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -776794762, now seen corresponding path program 137 times [2022-04-06 10:40:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:38,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416572831] [2022-04-06 10:40:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:38,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:40:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:38,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:40:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:38,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:40:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:40:39,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:40:39,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416572831] [2022-04-06 10:40:39,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416572831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:40:39,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562668144] [2022-04-06 10:40:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:40:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:39,044 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:39,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 10:40:39,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-06 10:40:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:40:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 10:40:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:40:39,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:40:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:40:39,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562668144] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:40:39,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:40:39,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-04-06 10:40:39,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466681670] [2022-04-06 10:40:39,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:40:39,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 10:40:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:40:39,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 10:40:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-06 10:40:39,520 INFO L87 Difference]: Start difference. First operand 1856 states and 2036 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:40:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:41,758 INFO L93 Difference]: Finished difference Result 2152 states and 2381 transitions. [2022-04-06 10:40:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 10:40:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-04-06 10:40:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:41,771 INFO L225 Difference]: With dead ends: 2152 [2022-04-06 10:40:41,771 INFO L226 Difference]: Without dead ends: 2082 [2022-04-06 10:40:41,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 10:40:41,850 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 278 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:41,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 92 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:40:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-04-06 10:40:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2034. [2022-04-06 10:40:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1830 states have (on average 1.1076502732240436) internal successors, (2027), 1960 states have internal predecessors, (2027), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-06 10:40:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2231 transitions. [2022-04-06 10:40:43,093 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2231 transitions. Word has length 66 [2022-04-06 10:40:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:43,093 INFO L478 AbstractCegarLoop]: Abstraction has 2034 states and 2231 transitions. [2022-04-06 10:40:43,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:40:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2231 transitions. [2022-04-06 10:40:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 10:40:43,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:43,118 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 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] [2022-04-06 10:40:43,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-04-06 10:40:43,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-04-06 10:40:43,319 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1923549793, now seen corresponding path program 138 times [2022-04-06 10:40:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646773135] [2022-04-06 10:40:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:43,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:40:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:43,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:40:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:40:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:40:43,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:40:43,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646773135] [2022-04-06 10:40:43,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646773135] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:40:43,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660323738] [2022-04-06 10:40:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:40:43,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:43,474 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:43,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 10:40:43,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 10:40:43,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:40:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 10:40:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:40:43,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:40:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 10:40:43,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660323738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:40:43,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:40:43,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-04-06 10:40:43,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589799090] [2022-04-06 10:40:43,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:40:43,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 10:40:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:40:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 10:40:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-06 10:40:43,956 INFO L87 Difference]: Start difference. First operand 2034 states and 2231 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:40:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:46,363 INFO L93 Difference]: Finished difference Result 3395 states and 3698 transitions. [2022-04-06 10:40:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 10:40:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-04-06 10:40:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:46,466 INFO L225 Difference]: With dead ends: 3395 [2022-04-06 10:40:46,467 INFO L226 Difference]: Without dead ends: 2260 [2022-04-06 10:40:46,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 10:40:46,497 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 243 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:46,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 107 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:40:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-04-06 10:40:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2212. [2022-04-06 10:40:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-04-06 10:40:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2426 transitions. [2022-04-06 10:40:47,888 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2426 transitions. Word has length 66 [2022-04-06 10:40:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:47,889 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2426 transitions. [2022-04-06 10:40:47,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:40:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2426 transitions. [2022-04-06 10:40:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:40:47,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:47,915 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 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] [2022-04-06 10:40:47,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-04-06 10:40:48,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-04-06 10:40:48,115 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash -414524724, now seen corresponding path program 139 times [2022-04-06 10:40:48,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:48,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999963013] [2022-04-06 10:40:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:48,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:48,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:40:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:40:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:48,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:40:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:40:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:40:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999963013] [2022-04-06 10:40:49,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999963013] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:40:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085203469] [2022-04-06 10:40:49,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:40:49,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:49,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:49,071 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:49,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 10:40:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:49,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 10:40:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:40:49,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:40:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:40:49,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085203469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:40:49,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:40:49,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 55 [2022-04-06 10:40:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737363230] [2022-04-06 10:40:49,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:40:49,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:40:49,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:40:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:40:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2853, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:40:49,960 INFO L87 Difference]: Start difference. First operand 2212 states and 2426 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:40:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:56,380 INFO L93 Difference]: Finished difference Result 2412 states and 2647 transitions. [2022-04-06 10:40:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 10:40:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:40:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:56,400 INFO L225 Difference]: With dead ends: 2412 [2022-04-06 10:40:56,400 INFO L226 Difference]: Without dead ends: 2406 [2022-04-06 10:40:56,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=337, Invalid=9965, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 10:40:56,426 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 380 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 12690 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 12762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 12690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:56,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 410 Invalid, 12762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 12690 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 10:40:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-04-06 10:40:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2228. [2022-04-06 10:40:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2021 states have (on average 1.106877783275606) internal successors, (2237), 2153 states have internal predecessors, (2237), 71 states have call successors, (71), 5 states have call predecessors, (71), 135 states have return successors, (137), 69 states have call predecessors, (137), 69 states have call successors, (137) [2022-04-06 10:40:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2445 transitions. [2022-04-06 10:40:57,835 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2445 transitions. Word has length 67 [2022-04-06 10:40:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:57,836 INFO L478 AbstractCegarLoop]: Abstraction has 2228 states and 2445 transitions. [2022-04-06 10:40:57,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:40:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2445 transitions. [2022-04-06 10:40:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:40:57,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:57,864 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 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, 1, 1, 1, 1] [2022-04-06 10:40:57,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-04-06 10:40:58,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-04-06 10:40:58,065 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash -452075401, now seen corresponding path program 140 times [2022-04-06 10:40:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:58,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024707420] [2022-04-06 10:40:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:58,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:40:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:58,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:40:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:40:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:40:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:40:58,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:40:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024707420] [2022-04-06 10:40:58,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024707420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:40:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73477433] [2022-04-06 10:40:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:40:58,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:58,994 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:58,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 10:40:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:40:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:40:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 10:40:59,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:40:59,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 10:41:00,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73477433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:00,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:00,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 55 [2022-04-06 10:41:00,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415440064] [2022-04-06 10:41:00,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:00,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2849, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:00,103 INFO L87 Difference]: Start difference. First operand 2228 states and 2445 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:06,078 INFO L93 Difference]: Finished difference Result 2234 states and 2450 transitions. [2022-04-06 10:41:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 10:41:06,078 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:41:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:06,091 INFO L225 Difference]: With dead ends: 2234 [2022-04-06 10:41:06,091 INFO L226 Difference]: Without dead ends: 2212 [2022-04-06 10:41:06,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=339, Invalid=9561, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 10:41:06,118 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 294 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 11825 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 11877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 11825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:06,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 400 Invalid, 11877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 11825 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 10:41:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-04-06 10:41:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2212. [2022-04-06 10:41:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-04-06 10:41:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2427 transitions. [2022-04-06 10:41:07,459 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2427 transitions. Word has length 67 [2022-04-06 10:41:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:07,459 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2427 transitions. [2022-04-06 10:41:07,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2427 transitions. [2022-04-06 10:41:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:07,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:07,485 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:41:07,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-04-06 10:41:07,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:07,685 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1840210900, now seen corresponding path program 141 times [2022-04-06 10:41:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084903725] [2022-04-06 10:41:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:07,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:07,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:08,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:41:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:41:08,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:08,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084903725] [2022-04-06 10:41:08,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084903725] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:08,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823042852] [2022-04-06 10:41:08,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:41:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:08,517 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:08,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-06 10:41:08,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-06 10:41:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:41:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 10:41:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:41:09,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:41:09,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823042852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:09,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:09,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 55 [2022-04-06 10:41:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157642628] [2022-04-06 10:41:09,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:09,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:09,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2845, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:09,646 INFO L87 Difference]: Start difference. First operand 2212 states and 2427 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:14,878 INFO L93 Difference]: Finished difference Result 2218 states and 2432 transitions. [2022-04-06 10:41:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 10:41:14,879 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:41:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:14,891 INFO L225 Difference]: With dead ends: 2218 [2022-04-06 10:41:14,891 INFO L226 Difference]: Without dead ends: 2194 [2022-04-06 10:41:14,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=341, Invalid=9165, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 10:41:14,920 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9542 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 9594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 9542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:14,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 360 Invalid, 9594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 9542 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 10:41:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-04-06 10:41:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2022-04-06 10:41:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1993 states have (on average 1.1063723030607124) internal successors, (2205), 2121 states have internal predecessors, (2205), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (133), 67 states have call predecessors, (133), 67 states have call successors, (133) [2022-04-06 10:41:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2407 transitions. [2022-04-06 10:41:16,338 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2407 transitions. Word has length 67 [2022-04-06 10:41:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:16,338 INFO L478 AbstractCegarLoop]: Abstraction has 2194 states and 2407 transitions. [2022-04-06 10:41:16,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2407 transitions. [2022-04-06 10:41:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:16,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:16,364 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:41:16,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-04-06 10:41:16,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:16,564 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1810811671, now seen corresponding path program 142 times [2022-04-06 10:41:16,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:16,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829300881] [2022-04-06 10:41:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:16,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:41:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:41:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:17,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829300881] [2022-04-06 10:41:17,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829300881] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:17,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506671573] [2022-04-06 10:41:17,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:41:17,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:17,358 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:17,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-06 10:41:17,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:41:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:41:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 10:41:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:41:18,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 10:41:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506671573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:18,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:18,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 55 [2022-04-06 10:41:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201327092] [2022-04-06 10:41:18,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:18,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:18,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:18,536 INFO L87 Difference]: Start difference. First operand 2194 states and 2407 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:23,275 INFO L93 Difference]: Finished difference Result 2200 states and 2412 transitions. [2022-04-06 10:41:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 10:41:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:41:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:23,288 INFO L225 Difference]: With dead ends: 2200 [2022-04-06 10:41:23,288 INFO L226 Difference]: Without dead ends: 2174 [2022-04-06 10:41:23,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=343, Invalid=8777, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 10:41:23,316 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 222 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 8060 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 8110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:23,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 335 Invalid, 8110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8060 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 10:41:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-04-06 10:41:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2174. [2022-04-06 10:41:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1976 states have (on average 1.1062753036437247) internal successors, (2186), 2102 states have internal predecessors, (2186), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (131), 66 states have call predecessors, (131), 66 states have call successors, (131) [2022-04-06 10:41:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2385 transitions. [2022-04-06 10:41:24,632 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2385 transitions. Word has length 67 [2022-04-06 10:41:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:24,632 INFO L478 AbstractCegarLoop]: Abstraction has 2174 states and 2385 transitions. [2022-04-06 10:41:24,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2385 transitions. [2022-04-06 10:41:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:24,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:24,656 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 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] [2022-04-06 10:41:24,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-04-06 10:41:24,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:24,857 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash -158431860, now seen corresponding path program 143 times [2022-04-06 10:41:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:24,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685816581] [2022-04-06 10:41:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:41:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:41:25,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685816581] [2022-04-06 10:41:25,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685816581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032798287] [2022-04-06 10:41:25,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:41:25,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:25,706 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:25,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-06 10:41:25,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 10:41:25,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:41:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 10:41:25,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:41:26,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 10:41:26,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032798287] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:26,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:26,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 55 [2022-04-06 10:41:26,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846868729] [2022-04-06 10:41:26,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:26,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:26,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:26,945 INFO L87 Difference]: Start difference. First operand 2174 states and 2385 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:31,073 INFO L93 Difference]: Finished difference Result 2180 states and 2390 transitions. [2022-04-06 10:41:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 10:41:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:41:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:31,086 INFO L225 Difference]: With dead ends: 2180 [2022-04-06 10:41:31,086 INFO L226 Difference]: Without dead ends: 2152 [2022-04-06 10:41:31,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=345, Invalid=8397, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 10:41:31,113 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 187 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6458 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 6506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:31,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 305 Invalid, 6506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6458 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 10:41:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-04-06 10:41:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2152. [2022-04-06 10:41:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1957 states have (on average 1.1062851303014818) internal successors, (2165), 2081 states have internal predecessors, (2165), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (129), 65 states have call predecessors, (129), 65 states have call successors, (129) [2022-04-06 10:41:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2361 transitions. [2022-04-06 10:41:32,496 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2361 transitions. Word has length 67 [2022-04-06 10:41:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:32,496 INFO L478 AbstractCegarLoop]: Abstraction has 2152 states and 2361 transitions. [2022-04-06 10:41:32,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2361 transitions. [2022-04-06 10:41:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:32,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:32,519 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2022-04-06 10:41:32,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-04-06 10:41:32,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:32,719 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -633565769, now seen corresponding path program 144 times [2022-04-06 10:41:32,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:32,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20464290] [2022-04-06 10:41:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:32,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:32,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:32,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:33,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:41:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:41:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:33,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20464290] [2022-04-06 10:41:33,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20464290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:33,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972821431] [2022-04-06 10:41:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:41:33,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:33,395 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:33,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-06 10:41:33,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 10:41:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:41:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 10:41:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:41:34,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 10:41:34,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972821431] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:34,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:34,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 55 [2022-04-06 10:41:34,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367089045] [2022-04-06 10:41:34,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:34,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2833, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:34,686 INFO L87 Difference]: Start difference. First operand 2152 states and 2361 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:38,464 INFO L93 Difference]: Finished difference Result 2158 states and 2366 transitions. [2022-04-06 10:41:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 10:41:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:41:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:38,476 INFO L225 Difference]: With dead ends: 2158 [2022-04-06 10:41:38,476 INFO L226 Difference]: Without dead ends: 2128 [2022-04-06 10:41:38,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=347, Invalid=8025, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 10:41:38,501 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 151 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5350 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 5396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:38,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 290 Invalid, 5396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5350 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 10:41:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-04-06 10:41:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2128. [2022-04-06 10:41:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1936 states have (on average 1.1064049586776858) internal successors, (2142), 2058 states have internal predecessors, (2142), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (127), 64 states have call predecessors, (127), 64 states have call successors, (127) [2022-04-06 10:41:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2335 transitions. [2022-04-06 10:41:39,789 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2335 transitions. Word has length 67 [2022-04-06 10:41:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:39,789 INFO L478 AbstractCegarLoop]: Abstraction has 2128 states and 2335 transitions. [2022-04-06 10:41:39,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2335 transitions. [2022-04-06 10:41:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:39,812 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:39,812 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 10:41:39,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-04-06 10:41:40,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:40,013 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash 861574892, now seen corresponding path program 145 times [2022-04-06 10:41:40,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:40,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104435496] [2022-04-06 10:41:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:40,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:40,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:40,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:40,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:41:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:41:40,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104435496] [2022-04-06 10:41:40,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104435496] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293511503] [2022-04-06 10:41:40,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:41:40,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:40,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:40,630 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:40,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-06 10:41:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 10:41:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:41:41,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 10:41:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293511503] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:42,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:42,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2022-04-06 10:41:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293581958] [2022-04-06 10:41:42,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:42,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:42,024 INFO L87 Difference]: Start difference. First operand 2128 states and 2335 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:45,222 INFO L93 Difference]: Finished difference Result 2134 states and 2340 transitions. [2022-04-06 10:41:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 10:41:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:41:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:45,233 INFO L225 Difference]: With dead ends: 2134 [2022-04-06 10:41:45,234 INFO L226 Difference]: Without dead ends: 2102 [2022-04-06 10:41:45,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=349, Invalid=7661, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 10:41:45,258 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 115 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:45,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 255 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 10:41:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-04-06 10:41:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2102. [2022-04-06 10:41:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1913 states have (on average 1.1066387872451646) internal successors, (2117), 2033 states have internal predecessors, (2117), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (125), 63 states have call predecessors, (125), 63 states have call successors, (125) [2022-04-06 10:41:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2307 transitions. [2022-04-06 10:41:46,593 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2307 transitions. Word has length 67 [2022-04-06 10:41:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:46,593 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2307 transitions. [2022-04-06 10:41:46,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:41:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2307 transitions. [2022-04-06 10:41:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:46,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:46,616 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 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] [2022-04-06 10:41:46,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-04-06 10:41:46,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:46,817 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1493055343, now seen corresponding path program 146 times [2022-04-06 10:41:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:46,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945406253] [2022-04-06 10:41:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:46,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 10:41:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 10:41:47,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:47,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945406253] [2022-04-06 10:41:47,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945406253] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:47,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735057921] [2022-04-06 10:41:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:41:47,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:47,225 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:47,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-06 10:41:47,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:41:47,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:41:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 10:41:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 10:41:48,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 10:41:48,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735057921] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:48,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:48,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-04-06 10:41:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374977668] [2022-04-06 10:41:48,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:48,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 10:41:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 10:41:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 10:41:48,929 INFO L87 Difference]: Start difference. First operand 2102 states and 2307 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:41:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:54,058 INFO L93 Difference]: Finished difference Result 2238 states and 2473 transitions. [2022-04-06 10:41:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 10:41:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 10:41:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:54,178 INFO L225 Difference]: With dead ends: 2238 [2022-04-06 10:41:54,178 INFO L226 Difference]: Without dead ends: 2217 [2022-04-06 10:41:54,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 10:41:54,210 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 1316 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5915 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:54,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 286 Invalid, 6042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5915 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 10:41:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-04-06 10:41:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2212. [2022-04-06 10:41:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1978 states have (on average 1.10262891809909) internal successors, (2181), 2128 states have internal predecessors, (2181), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-04-06 10:41:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2431 transitions. [2022-04-06 10:41:55,535 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2431 transitions. Word has length 67 [2022-04-06 10:41:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:55,536 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2431 transitions. [2022-04-06 10:41:55,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:41:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2431 transitions. [2022-04-06 10:41:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:41:55,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:55,562 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2022-04-06 10:41:55,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-04-06 10:41:55,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-04-06 10:41:55,763 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash -480171945, now seen corresponding path program 147 times [2022-04-06 10:41:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:55,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034957059] [2022-04-06 10:41:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:55,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:55,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:55,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:41:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:56,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:41:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 10:41:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034957059] [2022-04-06 10:41:56,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034957059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437098728] [2022-04-06 10:41:56,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:41:56,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:56,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:56,337 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:41:56,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-06 10:41:56,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 10:41:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:41:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:41:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 10:41:57,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 10:41:57,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437098728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:57,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:57,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 55 [2022-04-06 10:41:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062757473] [2022-04-06 10:41:57,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:57,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 10:41:57,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 10:41:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 10:41:57,715 INFO L87 Difference]: Start difference. First operand 2212 states and 2431 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:42:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:42:00,671 INFO L93 Difference]: Finished difference Result 2230 states and 2453 transitions. [2022-04-06 10:42:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 10:42:00,671 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-04-06 10:42:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:42:00,693 INFO L225 Difference]: With dead ends: 2230 [2022-04-06 10:42:00,693 INFO L226 Difference]: Without dead ends: 2209 [2022-04-06 10:42:00,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=351, Invalid=7305, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 10:42:00,723 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2998 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:42:00,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 248 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2998 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 10:42:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-04-06 10:42:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2204. [2022-04-06 10:42:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 1970 states have (on average 1.1035532994923858) internal successors, (2174), 2120 states have internal predecessors, (2174), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-04-06 10:42:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2424 transitions. [2022-04-06 10:42:02,122 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2424 transitions. Word has length 67 [2022-04-06 10:42:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:42:02,122 INFO L478 AbstractCegarLoop]: Abstraction has 2204 states and 2424 transitions. [2022-04-06 10:42:02,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 10:42:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2424 transitions. [2022-04-06 10:42:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 10:42:02,149 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:42:02,149 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 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] [2022-04-06 10:42:02,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-04-06 10:42:02,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-04-06 10:42:02,350 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:42:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:42:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1457390534, now seen corresponding path program 148 times [2022-04-06 10:42:02,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:42:02,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642355752] [2022-04-06 10:42:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:42:02,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:42:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:02,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:42:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:02,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:42:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:02,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 10:42:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 10:42:02,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:42:02,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642355752] [2022-04-06 10:42:02,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642355752] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:42:02,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041127678] [2022-04-06 10:42:02,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:42:02,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:42:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:42:02,751 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:42:02,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-06 10:42:02,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:42:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:42:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 10:42:02,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:42:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 10:42:03,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:42:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 10:42:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041127678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:42:04,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:42:04,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-04-06 10:42:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86645772] [2022-04-06 10:42:04,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:42:04,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 10:42:04,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:42:04,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 10:42:04,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 10:42:04,459 INFO L87 Difference]: Start difference. First operand 2204 states and 2424 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:42:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:42:09,464 INFO L93 Difference]: Finished difference Result 2218 states and 2437 transitions. [2022-04-06 10:42:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 10:42:09,464 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-06 10:42:09,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:42:09,478 INFO L225 Difference]: With dead ends: 2218 [2022-04-06 10:42:09,478 INFO L226 Difference]: Without dead ends: 2186 [2022-04-06 10:42:09,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 10:42:09,508 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 1311 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:42:09,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 274 Invalid, 5581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5473 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 10:42:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-04-06 10:42:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2022-04-06 10:42:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 1950 states have (on average 1.1035897435897435) internal successors, (2152), 2100 states have internal predecessors, (2152), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (156), 78 states have call predecessors, (156), 78 states have call successors, (156) [2022-04-06 10:42:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 2388 transitions. [2022-04-06 10:42:10,822 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 2388 transitions. Word has length 67 [2022-04-06 10:42:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:42:10,822 INFO L478 AbstractCegarLoop]: Abstraction has 2184 states and 2388 transitions. [2022-04-06 10:42:10,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:42:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 2388 transitions. [2022-04-06 10:42:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 10:42:10,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:42:10,848 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 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] [2022-04-06 10:42:10,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-04-06 10:42:11,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-04-06 10:42:11,049 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:42:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:42:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1904009907, now seen corresponding path program 149 times [2022-04-06 10:42:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:42:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486600284] [2022-04-06 10:42:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:42:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:42:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:11,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:42:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:11,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:42:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:11,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:42:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:42:11,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:42:11,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486600284] [2022-04-06 10:42:11,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486600284] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:42:11,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477250268] [2022-04-06 10:42:11,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:42:11,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:42:11,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:42:11,888 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:42:11,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-06 10:42:12,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-06 10:42:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:42:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 10:42:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:42:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:42:13,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:42:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:42:16,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477250268] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:42:16,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:42:16,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-04-06 10:42:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112171460] [2022-04-06 10:42:16,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:42:16,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 10:42:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:42:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 10:42:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 10:42:16,241 INFO L87 Difference]: Start difference. First operand 2184 states and 2388 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:42:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:42:29,450 INFO L93 Difference]: Finished difference Result 2390 states and 2627 transitions. [2022-04-06 10:42:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 10:42:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-06 10:42:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:42:29,522 INFO L225 Difference]: With dead ends: 2390 [2022-04-06 10:42:29,522 INFO L226 Difference]: Without dead ends: 2376 [2022-04-06 10:42:29,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 10:42:29,558 INFO L913 BasicCegarLoop]: 184 mSDtfsCounter, 3404 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 15871 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 15871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:42:29,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3409 Valid, 486 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 15871 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-04-06 10:42:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-04-06 10:42:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2367. [2022-04-06 10:42:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2112 states have (on average 1.103219696969697) internal successors, (2330), 2276 states have internal predecessors, (2330), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (177), 85 states have call predecessors, (177), 85 states have call successors, (177) [2022-04-06 10:42:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2594 transitions. [2022-04-06 10:42:31,138 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2594 transitions. Word has length 68 [2022-04-06 10:42:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:42:31,138 INFO L478 AbstractCegarLoop]: Abstraction has 2367 states and 2594 transitions. [2022-04-06 10:42:31,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:42:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2594 transitions. [2022-04-06 10:42:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 10:42:31,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:42:31,165 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 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] [2022-04-06 10:42:31,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-04-06 10:42:31,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-04-06 10:42:31,366 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:42:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:42:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1165319677, now seen corresponding path program 150 times [2022-04-06 10:42:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:42:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195967817] [2022-04-06 10:42:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:42:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:42:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:31,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:42:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:42:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 10:42:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:42:32,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:42:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195967817] [2022-04-06 10:42:32,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195967817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:42:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655462641] [2022-04-06 10:42:32,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 10:42:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:42:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:42:32,202 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:42:32,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-04-06 10:42:32,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 10:42:32,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:42:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 10:42:32,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:42:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:42:34,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:42:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:42:36,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655462641] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:42:36,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:42:36,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-04-06 10:42:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12056538] [2022-04-06 10:42:36,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:42:36,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 10:42:36,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:42:36,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 10:42:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 10:42:36,354 INFO L87 Difference]: Start difference. First operand 2367 states and 2594 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:42:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:42:49,643 INFO L93 Difference]: Finished difference Result 2382 states and 2609 transitions. [2022-04-06 10:42:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 10:42:49,644 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-04-06 10:42:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:42:49,659 INFO L225 Difference]: With dead ends: 2382 [2022-04-06 10:42:49,659 INFO L226 Difference]: Without dead ends: 2370 [2022-04-06 10:42:49,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4663 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 10:42:49,695 INFO L913 BasicCegarLoop]: 186 mSDtfsCounter, 3464 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 16065 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 16395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 16065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:42:49,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 483 Invalid, 16395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 16065 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-04-06 10:42:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-04-06 10:42:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2368. [2022-04-06 10:42:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2113 states have (on average 1.1031708471367723) internal successors, (2331), 2277 states have internal predecessors, (2331), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-04-06 10:42:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2587 transitions. [2022-04-06 10:42:51,184 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2587 transitions. Word has length 68 [2022-04-06 10:42:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:42:51,184 INFO L478 AbstractCegarLoop]: Abstraction has 2368 states and 2587 transitions. [2022-04-06 10:42:51,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:42:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2587 transitions. [2022-04-06 10:42:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 10:42:51,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:42:51,215 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 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] [2022-04-06 10:42:51,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-04-06 10:42:51,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:42:51,416 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:42:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:42:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash -236879690, now seen corresponding path program 151 times [2022-04-06 10:42:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:42:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896987933] [2022-04-06 10:42:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:42:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:42:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:51,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:42:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:51,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:42:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:51,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:42:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 10:42:51,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:42:51,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896987933] [2022-04-06 10:42:51,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896987933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:42:51,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479327794] [2022-04-06 10:42:51,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 10:42:51,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:42:51,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:42:51,578 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:42:51,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-04-06 10:42:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:42:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 10:42:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:42:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 10:42:51,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:42:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 10:42:52,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479327794] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:42:52,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:42:52,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-04-06 10:42:52,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934483491] [2022-04-06 10:42:52,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:42:52,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 10:42:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:42:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 10:42:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:42:52,034 INFO L87 Difference]: Start difference. First operand 2368 states and 2587 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)