/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 05:57:34,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 05:57:34,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 05:57:34,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 05:57:34,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 05:57:34,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 05:57:34,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 05:57:34,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 05:57:34,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 05:57:34,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 05:57:34,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 05:57:34,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 05:57:34,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 05:57:34,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 05:57:34,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 05:57:34,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 05:57:34,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 05:57:34,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 05:57:34,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 05:57:34,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 05:57:34,146 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 05:57:34,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 05:57:34,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 05:57:34,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 05:57:34,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 05:57:34,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 05:57:34,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 05:57:34,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 05:57:34,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 05:57:34,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 05:57:34,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 05:57:34,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 05:57:34,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 05:57:34,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 05:57:34,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 05:57:34,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 05:57:34,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 05:57:34,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 05:57:34,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 05:57:34,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 05:57:34,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 05:57:34,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 05:57:34,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 05:57:34,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 05:57:34,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 05:57:34,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 05:57:34,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 05:57:34,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 05:57:34,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 05:57:34,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 05:57:34,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 05:57:34,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 05:57:34,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 05:57:34,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 05:57:34,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 05:57:34,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 05:57:34,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 05:57:34,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 05:57:34,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 05:57:34,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 05:57:34,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 05:57:34,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:57:34,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 05:57:34,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 05:57:34,172 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 05:57:34,172 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 05:57:34,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 05:57:34,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 05:57:34,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 05:57:34,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 05:57:34,423 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 05:57:34,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2022-04-06 05:57:34,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84a5631b1/be0ed2104ee64b6dac13116f1da94ae3/FLAG1e69ca795 [2022-04-06 05:57:34,797 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 05:57:34,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2022-04-06 05:57:34,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84a5631b1/be0ed2104ee64b6dac13116f1da94ae3/FLAG1e69ca795 [2022-04-06 05:57:35,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84a5631b1/be0ed2104ee64b6dac13116f1da94ae3 [2022-04-06 05:57:35,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 05:57:35,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 05:57:35,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 05:57:35,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 05:57:35,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 05:57:35,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4920af73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35, skipping insertion in model container [2022-04-06 05:57:35,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 05:57:35,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 05:57:35,341 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/bresenham-ll_unwindbound10.c[597,610] [2022-04-06 05:57:35,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:57:35,372 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 05:57:35,384 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/bresenham-ll_unwindbound10.c[597,610] [2022-04-06 05:57:35,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:57:35,408 INFO L208 MainTranslator]: Completed translation [2022-04-06 05:57:35,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35 WrapperNode [2022-04-06 05:57:35,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 05:57:35,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 05:57:35,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 05:57:35,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 05:57:35,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 05:57:35,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 05:57:35,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 05:57:35,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 05:57:35,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:57:35,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:35,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 05:57:35,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 05:57:35,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 05:57:35,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 05:57:35,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 05:57:35,487 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 05:57:35,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 05:57:35,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 05:57:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 05:57:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 05:57:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 05:57:35,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 05:57:35,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 05:57:35,529 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 05:57:35,531 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 05:57:35,680 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 05:57:35,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 05:57:35,685 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 05:57:35,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:57:35 BoogieIcfgContainer [2022-04-06 05:57:35,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 05:57:35,687 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 05:57:35,687 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 05:57:35,704 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 05:57:35,706 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:57:35" (1/1) ... [2022-04-06 05:57:35,707 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 05:57:35,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:57:35 BasicIcfg [2022-04-06 05:57:35,718 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 05:57:35,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 05:57:35,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 05:57:35,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 05:57:35,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:57:35" (1/4) ... [2022-04-06 05:57:35,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543ccefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:57:35, skipping insertion in model container [2022-04-06 05:57:35,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:57:35" (2/4) ... [2022-04-06 05:57:35,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543ccefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:57:35, skipping insertion in model container [2022-04-06 05:57:35,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:57:35" (3/4) ... [2022-04-06 05:57:35,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543ccefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:57:35, skipping insertion in model container [2022-04-06 05:57:35,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:57:35" (4/4) ... [2022-04-06 05:57:35,723 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.cJordan [2022-04-06 05:57:35,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 05:57:35,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 05:57:35,791 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 05:57:35,795 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 05:57:35,795 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 05:57:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 05:57:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 05:57:35,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:35,823 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:35,823 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:35,827 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-04-06 05:57:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:35,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766699938] [2022-04-06 05:57:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:57:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:57:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766699938] [2022-04-06 05:57:35,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766699938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:57:36,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:57:36,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 05:57:36,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748100044] [2022-04-06 05:57:36,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:57:36,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 05:57:36,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 05:57:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:57:36,032 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:57:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:36,080 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-06 05:57:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 05:57:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 05:57:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:36,090 INFO L225 Difference]: With dead ends: 26 [2022-04-06 05:57:36,090 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 05:57:36,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:57:36,096 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:36,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:57:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 05:57:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 05:57:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 05:57:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 05:57:36,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-06 05:57:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:36,123 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 05:57:36,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:57:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 05:57:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 05:57:36,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:36,125 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:36,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 05:57:36,125 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-04-06 05:57:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:36,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602843048] [2022-04-06 05:57:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:36,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:36,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:36,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078194708] [2022-04-06 05:57:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:36,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:36,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:36,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 05:57:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 05:57:36,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:57:36,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:57:36,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:36,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602843048] [2022-04-06 05:57:36,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:36,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078194708] [2022-04-06 05:57:36,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078194708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:57:36,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:57:36,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 05:57:36,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772433575] [2022-04-06 05:57:36,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:57:36,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:57:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:57:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 05:57:36,362 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:57:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:36,465 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-04-06 05:57:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:57:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 05:57:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:36,466 INFO L225 Difference]: With dead ends: 32 [2022-04-06 05:57:36,466 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 05:57:36,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 05:57:36,467 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:36,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:57:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 05:57:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 05:57:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:57:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-06 05:57:36,475 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-04-06 05:57:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:36,475 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-06 05:57:36,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:57:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-06 05:57:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 05:57:36,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:36,476 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:36,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 05:57:36,676 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 [2022-04-06 05:57:36,679 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-04-06 05:57:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:36,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663095594] [2022-04-06 05:57:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:36,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:36,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372700481] [2022-04-06 05:57:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:36,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:36,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:36,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 05:57:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:36,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 05:57:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:57:36,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:57:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:57:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:37,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663095594] [2022-04-06 05:57:37,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:37,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372700481] [2022-04-06 05:57:37,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372700481] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:57:37,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:57:37,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-06 05:57:37,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860540997] [2022-04-06 05:57:37,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:57:37,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 05:57:37,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:37,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 05:57:37,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 05:57:37,074 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:57:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:37,418 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-04-06 05:57:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 05:57:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-04-06 05:57:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:37,419 INFO L225 Difference]: With dead ends: 43 [2022-04-06 05:57:37,419 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 05:57:37,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 05:57:37,420 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:37,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 100 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 05:57:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 05:57:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-06 05:57:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 05:57:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-06 05:57:37,425 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-04-06 05:57:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:37,425 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-06 05:57:37,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:57:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-06 05:57:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 05:57:37,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:37,430 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:37,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 05:57:37,630 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 [2022-04-06 05:57:37,630 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-04-06 05:57:37,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:37,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654265891] [2022-04-06 05:57:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:37,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692285726] [2022-04-06 05:57:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:37,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:37,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 05:57:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 05:57:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:57:37,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:57:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:57:37,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654265891] [2022-04-06 05:57:37,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692285726] [2022-04-06 05:57:37,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692285726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:57:37,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:57:37,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 05:57:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105236662] [2022-04-06 05:57:37,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:57:37,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 05:57:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 05:57:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 05:57:37,807 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 05:57:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:37,877 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-04-06 05:57:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 05:57:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-04-06 05:57:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:37,879 INFO L225 Difference]: With dead ends: 71 [2022-04-06 05:57:37,879 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 05:57:37,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 05:57:37,880 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:37,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:57:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 05:57:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-04-06 05:57:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 05:57:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-04-06 05:57:37,886 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-04-06 05:57:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:37,887 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-04-06 05:57:37,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 05:57:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-04-06 05:57:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 05:57:37,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:37,888 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:37,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 05:57:38,091 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 [2022-04-06 05:57:38,092 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-04-06 05:57:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302263369] [2022-04-06 05:57:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:38,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:38,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351824593] [2022-04-06 05:57:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:38,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:38,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:38,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 05:57:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:38,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 05:57:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:57:38,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:57:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:57:38,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302263369] [2022-04-06 05:57:38,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351824593] [2022-04-06 05:57:38,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351824593] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:57:38,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:57:38,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-04-06 05:57:38,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017120279] [2022-04-06 05:57:38,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:57:38,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 05:57:38,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 05:57:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-04-06 05:57:38,831 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 05:57:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:39,342 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-04-06 05:57:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 05:57:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-06 05:57:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:39,343 INFO L225 Difference]: With dead ends: 82 [2022-04-06 05:57:39,343 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 05:57:39,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 05:57:39,345 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:39,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 199 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 288 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-04-06 05:57:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 05:57:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-04-06 05:57:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 05:57:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-04-06 05:57:39,350 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-04-06 05:57:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:39,350 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-04-06 05:57:39,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 05:57:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-04-06 05:57:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 05:57:39,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:39,351 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:39,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 05:57:39,567 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 [2022-04-06 05:57:39,568 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-04-06 05:57:39,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048977893] [2022-04-06 05:57:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:39,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:39,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257737147] [2022-04-06 05:57:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:39,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:39,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:39,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:39,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 05:57:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:39,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 05:57:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:39,781 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:57:39,784 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:57:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 05:57:40,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:57:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 05:57:40,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:40,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048977893] [2022-04-06 05:57:40,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:40,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257737147] [2022-04-06 05:57:40,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257737147] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:57:40,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:57:40,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-04-06 05:57:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793036452] [2022-04-06 05:57:40,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:57:40,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 05:57:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 05:57:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 05:57:40,434 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 05:57:42,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 05:57:46,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 05:57:48,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 05:57:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:50,918 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2022-04-06 05:57:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 05:57:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-04-06 05:57:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:50,919 INFO L225 Difference]: With dead ends: 94 [2022-04-06 05:57:50,920 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 05:57:50,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552 [2022-04-06 05:57:50,921 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:50,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 130 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 182 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-04-06 05:57:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 05:57:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-06 05:57:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 05:57:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-04-06 05:57:50,926 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-04-06 05:57:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:50,927 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-04-06 05:57:50,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 05:57:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-04-06 05:57:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 05:57:50,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:50,928 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:50,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 05:57:51,144 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 [2022-04-06 05:57:51,145 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-04-06 05:57:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:51,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641766676] [2022-04-06 05:57:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:51,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940210805] [2022-04-06 05:57:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:51,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:51,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:51,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:51,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 05:57:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:57:51,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 05:57:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 05:57:51,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:57:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 05:57:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:51,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641766676] [2022-04-06 05:57:51,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:51,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940210805] [2022-04-06 05:57:51,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940210805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:57:51,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:57:51,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 05:57:51,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220395698] [2022-04-06 05:57:51,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:57:51,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 05:57:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 05:57:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 05:57:51,539 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 05:57:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:51,677 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-04-06 05:57:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 05:57:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-04-06 05:57:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:51,679 INFO L225 Difference]: With dead ends: 91 [2022-04-06 05:57:51,679 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 05:57:51,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-04-06 05:57:51,680 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:51,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 114 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:57:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 05:57:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-04-06 05:57:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 05:57:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-04-06 05:57:51,684 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-04-06 05:57:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:51,685 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-04-06 05:57:51,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 05:57:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-04-06 05:57:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 05:57:51,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:51,686 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:51,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 05:57:51,886 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 [2022-04-06 05:57:51,886 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-04-06 05:57:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:51,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768453965] [2022-04-06 05:57:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:51,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:51,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:51,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127438703] [2022-04-06 05:57:51,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:57:51,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:51,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:51,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 05:57:51,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:57:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:57:51,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 05:57:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 05:57:52,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:57:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 05:57:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:57:52,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768453965] [2022-04-06 05:57:52,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:57:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127438703] [2022-04-06 05:57:52,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127438703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:57:52,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:57:52,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 05:57:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710319676] [2022-04-06 05:57:52,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:57:52,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 05:57:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:57:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 05:57:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 05:57:52,311 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 05:57:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:57:52,456 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-04-06 05:57:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 05:57:52,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-04-06 05:57:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:57:52,457 INFO L225 Difference]: With dead ends: 102 [2022-04-06 05:57:52,457 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 05:57:52,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-04-06 05:57:52,458 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:57:52,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:57:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 05:57:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-04-06 05:57:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 05:57:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-04-06 05:57:52,463 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-04-06 05:57:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:57:52,463 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-04-06 05:57:52,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 05:57:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-04-06 05:57:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 05:57:52,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:57:52,464 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:57:52,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 05:57:52,679 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 [2022-04-06 05:57:52,679 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:57:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:57:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-04-06 05:57:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:57:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119324308] [2022-04-06 05:57:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:57:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:57:52,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:57:52,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594316481] [2022-04-06 05:57:52,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:57:52,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:57:52,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:57:52,687 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:57:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 05:57:53,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-06 05:57:53,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:57:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 05:57:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:57:53,392 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:57:53,395 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:57:53,396 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:57:56,498 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false