/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:55:32,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:55:32,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:55:32,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:55:32,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:55:32,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:55:32,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:55:32,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:55:32,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:55:32,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:55:32,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:55:32,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:55:32,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:55:32,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:55:32,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:55:32,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:55:32,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:55:32,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:55:32,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:55:32,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:55:32,135 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:55:32,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:55:32,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:55:32,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:55:32,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:55:32,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 11:55:32,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 11:55:32,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 11:55:32,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 11:55:32,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 11:55:32,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 11:55:32,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 11:55:32,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 11:55:32,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 11:55:32,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 11:55:32,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 11:55:32,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 11:55:32,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 11:55:32,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 11:55:32,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:55:32,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:55:32,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:55:32,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 11:55:32,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:55:32,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:55:32,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:55:32,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:55:32,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:55:32,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:55:32,179 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:55:32,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:55:32,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:55:32,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:55:32,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:55:32,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:55:32,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:55:32,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:55:32,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:55:32,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:55:32,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:55:32,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:55:32,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:55:32,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:55:32,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:55:32,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:55:32,183 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:55:32,183 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:55:32,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:55:32,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:55:32,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:55:32,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:55:32,428 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:55:32,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2022-03-20 11:55:32,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e112cde8e/e70dd30b8f7c464cae755733f8d412a1/FLAGdf2853be7 [2022-03-20 11:55:32,834 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:55:32,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2022-03-20 11:55:32,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e112cde8e/e70dd30b8f7c464cae755733f8d412a1/FLAGdf2853be7 [2022-03-20 11:55:32,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e112cde8e/e70dd30b8f7c464cae755733f8d412a1 [2022-03-20 11:55:32,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:55:32,849 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:55:32,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:55:32,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:55:32,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:55:32,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:55:32" (1/1) ... [2022-03-20 11:55:32,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348c4b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:32, skipping insertion in model container [2022-03-20 11:55:32,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:55:32" (1/1) ... [2022-03-20 11:55:32,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:55:32,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:55:33,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2022-03-20 11:55:33,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:55:33,040 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:55:33,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2022-03-20 11:55:33,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:55:33,078 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:55:33,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33 WrapperNode [2022-03-20 11:55:33,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:55:33,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:55:33,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:55:33,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:55:33,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:55:33,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:55:33,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:55:33,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:55:33,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:55:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:33,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 11:55:33,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 11:55:33,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:55:33,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:55:33,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:55:33,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:55:33,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:55:33,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:55:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:55:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:55:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:55:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:55:33,288 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:55:33,289 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:55:33,424 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:55:33,428 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:55:33,428 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:55:33,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:55:33 BoogieIcfgContainer [2022-03-20 11:55:33,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:55:33,430 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:55:33,430 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:55:33,436 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:55:33,453 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:55:33" (1/1) ... [2022-03-20 11:55:33,455 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:55:33,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:55:33 BasicIcfg [2022-03-20 11:55:33,466 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:55:33,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:55:33,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:55:33,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:55:33,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:55:32" (1/4) ... [2022-03-20 11:55:33,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0a98e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:55:33, skipping insertion in model container [2022-03-20 11:55:33,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:55:33" (2/4) ... [2022-03-20 11:55:33,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0a98e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:55:33, skipping insertion in model container [2022-03-20 11:55:33,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:55:33" (3/4) ... [2022-03-20 11:55:33,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0a98e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:55:33, skipping insertion in model container [2022-03-20 11:55:33,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:55:33" (4/4) ... [2022-03-20 11:55:33,481 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.cqvasr [2022-03-20 11:55:33,484 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:55:33,485 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:55:33,558 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:55:33,562 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 11:55:33,562 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:55:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:55:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 11:55:33,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:33,578 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:33,578 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-03-20 11:55:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639486730] [2022-03-20 11:55:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:55:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:55:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:33,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 11:55:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:55:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639486730] [2022-03-20 11:55:33,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639486730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:55:33,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:55:33,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:55:33,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388746035] [2022-03-20 11:55:33,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:55:33,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:55:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:55:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:55:33,807 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-20 11:55:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:33,871 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-03-20 11:55:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:55:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22 [2022-03-20 11:55:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:33,878 INFO L225 Difference]: With dead ends: 51 [2022-03-20 11:55:33,878 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 11:55:33,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:55:33,882 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:33,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:55:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 11:55:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 11:55:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:55:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 11:55:33,906 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-20 11:55:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:33,907 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 11:55:33,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-20 11:55:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 11:55:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 11:55:33,908 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:33,908 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:33,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:55:33,908 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-03-20 11:55:33,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:33,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828418725] [2022-03-20 11:55:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:33,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:33,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302301167] [2022-03-20 11:55:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:33,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:33,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:33,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 11:55:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:55:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:55:34,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:55:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:34,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828418725] [2022-03-20 11:55:34,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:34,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302301167] [2022-03-20 11:55:34,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302301167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:55:34,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:55:34,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:55:34,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647228867] [2022-03-20 11:55:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:55:34,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:55:34,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:55:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:55:34,132 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 11:55:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:34,191 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 11:55:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:55:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 11:55:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:34,192 INFO L225 Difference]: With dead ends: 35 [2022-03-20 11:55:34,192 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 11:55:34,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:55:34,193 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:34,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:55:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 11:55:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 11:55:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:55:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 11:55:34,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-20 11:55:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:34,200 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 11:55:34,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 11:55:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 11:55:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 11:55:34,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:34,201 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] [2022-03-20 11:55:34,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 11:55:34,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:34,418 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-03-20 11:55:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:34,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283980596] [2022-03-20 11:55:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:34,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:34,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252293522] [2022-03-20 11:55:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:34,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:34,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:34,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:34,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 11:55:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 11:55:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:55:34,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 11:55:35,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283980596] [2022-03-20 11:55:35,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252293522] [2022-03-20 11:55:35,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252293522] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:35,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:35,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 11:55:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953923852] [2022-03-20 11:55:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:55:35,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:55:35,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:55:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 11:55:35,210 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:55:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:35,239 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-03-20 11:55:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:55:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-20 11:55:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:35,240 INFO L225 Difference]: With dead ends: 37 [2022-03-20 11:55:35,240 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 11:55:35,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:55:35,241 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:35,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:55:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 11:55:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 11:55:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:55:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-20 11:55:35,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-20 11:55:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:35,247 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-20 11:55:35,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:55:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-20 11:55:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 11:55:35,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:35,249 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:35,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 11:55:35,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 11:55:35,453 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-03-20 11:55:35,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:35,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980694846] [2022-03-20 11:55:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:35,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:35,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619611751] [2022-03-20 11:55:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:35,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:35,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:35,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 11:55:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:55:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 11:55:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 11:55:35,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980694846] [2022-03-20 11:55:35,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619611751] [2022-03-20 11:55:35,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619611751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:35,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:35,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 11:55:35,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687315745] [2022-03-20 11:55:35,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:55:35,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 11:55:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 11:55:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:55:35,795 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 11:55:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:35,850 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 11:55:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:55:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-20 11:55:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:35,851 INFO L225 Difference]: With dead ends: 42 [2022-03-20 11:55:35,851 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 11:55:35,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:55:35,852 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:35,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:55:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 11:55:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 11:55:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:55:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-20 11:55:35,858 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-20 11:55:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:35,858 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-20 11:55:35,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 11:55:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-20 11:55:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 11:55:35,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:35,859 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:35,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 11:55:36,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:36,077 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-03-20 11:55:36,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:36,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922465137] [2022-03-20 11:55:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:36,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369799999] [2022-03-20 11:55:36,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:55:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:36,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:36,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 11:55:36,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:55:36,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:55:36,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 11:55:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 11:55:36,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922465137] [2022-03-20 11:55:36,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369799999] [2022-03-20 11:55:36,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369799999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:36,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:36,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 11:55:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644509464] [2022-03-20 11:55:36,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:55:36,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:55:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:55:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:55:36,507 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 11:55:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:36,566 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-03-20 11:55:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 11:55:36,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-20 11:55:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:36,567 INFO L225 Difference]: With dead ends: 45 [2022-03-20 11:55:36,567 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 11:55:36,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:55:36,568 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:36,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:55:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 11:55:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 11:55:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:55:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-20 11:55:36,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-20 11:55:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:36,574 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-20 11:55:36,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 11:55:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-20 11:55:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 11:55:36,575 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:36,575 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:36,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 11:55:36,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:36,780 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-03-20 11:55:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74158028] [2022-03-20 11:55:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:36,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233859723] [2022-03-20 11:55:36,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:55:36,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:36,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:36,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 11:55:36,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:55:36,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:55:36,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 11:55:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 11:55:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74158028] [2022-03-20 11:55:37,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233859723] [2022-03-20 11:55:37,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233859723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:37,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:37,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 11:55:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733831678] [2022-03-20 11:55:37,232 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:55:37,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 11:55:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 11:55:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:55:37,233 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-20 11:55:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:37,303 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 11:55:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:55:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-20 11:55:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:37,304 INFO L225 Difference]: With dead ends: 48 [2022-03-20 11:55:37,305 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 11:55:37,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:55:37,305 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:37,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:55:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 11:55:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-20 11:55:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 11:55:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-20 11:55:37,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-20 11:55:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:37,311 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-20 11:55:37,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-20 11:55:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-20 11:55:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 11:55:37,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:37,312 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:37,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 11:55:37,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:37,520 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-03-20 11:55:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285113344] [2022-03-20 11:55:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:37,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288915942] [2022-03-20 11:55:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:55:37,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:37,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:37,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 11:55:37,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:55:37,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:55:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:55:37,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 11:55:37,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285113344] [2022-03-20 11:55:37,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288915942] [2022-03-20 11:55:37,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288915942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:37,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:37,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 11:55:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30403629] [2022-03-20 11:55:37,927 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:55:37,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:55:37,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:37,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:55:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:55:37,929 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 11:55:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:38,034 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-20 11:55:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:55:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-20 11:55:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:38,037 INFO L225 Difference]: With dead ends: 51 [2022-03-20 11:55:38,037 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 11:55:38,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:55:38,041 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:38,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:55:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 11:55:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 11:55:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:55:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-20 11:55:38,054 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-20 11:55:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:38,054 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-20 11:55:38,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 11:55:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-20 11:55:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 11:55:38,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:38,056 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:38,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 11:55:38,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:38,272 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-03-20 11:55:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087983949] [2022-03-20 11:55:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:38,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978456412] [2022-03-20 11:55:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:55:38,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:38,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:38,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 11:55:38,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 11:55:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:55:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:55:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 11:55:39,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:39,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087983949] [2022-03-20 11:55:39,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978456412] [2022-03-20 11:55:39,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978456412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:39,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:39,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 11:55:39,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149833781] [2022-03-20 11:55:39,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:55:39,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 11:55:39,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 11:55:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:55:39,164 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 11:55:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:39,282 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-03-20 11:55:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 11:55:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-20 11:55:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:39,283 INFO L225 Difference]: With dead ends: 54 [2022-03-20 11:55:39,283 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 11:55:39,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:55:39,284 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:39,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:55:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 11:55:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-20 11:55:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:55:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-20 11:55:39,290 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-20 11:55:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:39,290 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-20 11:55:39,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 11:55:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-20 11:55:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 11:55:39,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:39,291 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:39,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 11:55:39,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:39,515 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-03-20 11:55:39,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:39,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034115543] [2022-03-20 11:55:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:39,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:39,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439704441] [2022-03-20 11:55:39,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:55:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:39,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:39,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 11:55:40,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 11:55:40,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:55:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 11:55:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:55:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 11:55:40,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:55:40,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:55:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034115543] [2022-03-20 11:55:40,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:55:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439704441] [2022-03-20 11:55:40,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439704441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:55:40,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:55:40,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 11:55:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418450263] [2022-03-20 11:55:40,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:55:40,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 11:55:40,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:55:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 11:55:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:55:40,448 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 11:55:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:55:40,585 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-20 11:55:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 11:55:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-03-20 11:55:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:55:40,586 INFO L225 Difference]: With dead ends: 57 [2022-03-20 11:55:40,586 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 11:55:40,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:55:40,587 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:55:40,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:55:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 11:55:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 11:55:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:55:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-20 11:55:40,593 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-03-20 11:55:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:55:40,593 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-20 11:55:40,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 11:55:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-20 11:55:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 11:55:40,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:55:40,594 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:55:40,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 11:55:40,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 11:55:40,800 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:55:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:55:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2022-03-20 11:55:40,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:55:40,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767693407] [2022-03-20 11:55:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:55:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:55:40,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:55:40,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100864660] [2022-03-20 11:55:40,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:55:40,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:55:40,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:55:40,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:55:40,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 11:56:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:56:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 11:56:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:56:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 11:56:42,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:56:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:56:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767693407] [2022-03-20 11:56:42,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:56:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100864660] [2022-03-20 11:56:42,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100864660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:56:42,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:56:42,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 11:56:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416876180] [2022-03-20 11:56:42,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:56:42,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 11:56:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:56:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 11:56:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:56:42,496 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-20 11:56:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:56:42,637 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-20 11:56:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:56:42,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-03-20 11:56:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:56:42,638 INFO L225 Difference]: With dead ends: 60 [2022-03-20 11:56:42,638 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 11:56:42,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 11:56:42,639 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:56:42,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:56:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 11:56:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 11:56:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 11:56:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-20 11:56:42,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-03-20 11:56:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:56:42,645 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-20 11:56:42,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-20 11:56:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-20 11:56:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 11:56:42,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:56:42,646 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:56:42,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 11:56:42,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 11:56:42,871 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:56:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:56:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2022-03-20 11:56:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:56:42,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702432127] [2022-03-20 11:56:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:56:42,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:56:42,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:56:42,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385658195] [2022-03-20 11:56:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:56:42,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:56:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:56:42,883 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:56:42,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 11:56:43,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:56:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:56:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 11:56:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:56:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 63 proven. 113 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 11:56:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:56:48,226 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 18) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 119) c_main_~y~0 c_main_~y~0)) (.cse3 (* (- 65) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ .cse0 .cse1 .cse2 (* (- 120) c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse3) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse4 (+ c_main_~y~0 1))) (= (* .cse4 .cse4) (* main_~k~0 .cse4))))) (not (<= (+ (* 10 (* c_main_~y~0 c_main_~y~0)) (* 5 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1) (div (+ .cse0 .cse1 .cse2 (- 12) .cse3) (- 12)))))) is different from false [2022-03-20 11:56:52,298 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 5) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0)))))) is different from false [2022-03-20 11:56:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:56:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702432127] [2022-03-20 11:56:52,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:56:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385658195] [2022-03-20 11:56:52,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385658195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:56:52,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:56:52,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 11:56:52,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111604150] [2022-03-20 11:56:52,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:56:52,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 11:56:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:56:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 11:56:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=404, Unknown=2, NotChecked=82, Total=552 [2022-03-20 11:56:52,303 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-20 11:56:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:56:52,566 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-20 11:56:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 11:56:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-03-20 11:56:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:56:52,567 INFO L225 Difference]: With dead ends: 63 [2022-03-20 11:56:52,567 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 11:56:52,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=85, Invalid=521, Unknown=2, NotChecked=94, Total=702 [2022-03-20 11:56:52,568 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:56:52,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 532 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:56:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 11:56:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 11:56:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 11:56:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-03-20 11:56:52,575 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-03-20 11:56:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:56:52,575 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-03-20 11:56:52,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-20 11:56:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-03-20 11:56:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 11:56:52,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:56:52,576 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:56:52,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 11:56:52,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 11:56:52,782 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:56:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:56:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2022-03-20 11:56:52,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:56:52,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42522164] [2022-03-20 11:56:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:56:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:56:52,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:56:52,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240442030] [2022-03-20 11:56:52,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:56:52,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:56:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:56:52,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:56:52,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process