/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:33:41,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:33:41,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:33:41,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:33:41,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:33:41,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:33:41,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:33:41,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:33:41,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:33:41,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:33:41,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:33:41,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:33:41,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:33:41,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:33:41,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:33:41,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:33:41,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:33:41,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:33:41,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:33:41,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:33:41,266 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:33:41,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:33:41,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:33:41,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:33:41,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:33:41,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 10:33:41,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:33:41,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:33:41,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:33:41,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:33:41,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:33:41,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:33:41,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:33:41,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:33:41,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:33:41,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:33:41,297 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:33:41,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:33:41,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:33:41,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:33:41,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:33:41,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:33:41,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:33:41,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:33:41,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:33:41,300 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:33:41,300 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:33:41,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:33:41,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:33:41,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:33:41,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:33:41,494 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:33:41,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2022-03-20 10:33:41,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4593cc1fb/365633b1f5564ae4a0623f62f5e85606/FLAG5c1e59eaf [2022-03-20 10:33:41,873 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:33:41,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2022-03-20 10:33:41,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4593cc1fb/365633b1f5564ae4a0623f62f5e85606/FLAG5c1e59eaf [2022-03-20 10:33:41,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4593cc1fb/365633b1f5564ae4a0623f62f5e85606 [2022-03-20 10:33:41,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:33:41,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:33:41,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:33:41,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:33:41,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:33:41,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:33:41" (1/1) ... [2022-03-20 10:33:41,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c24407c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:41, skipping insertion in model container [2022-03-20 10:33:41,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:33:41" (1/1) ... [2022-03-20 10:33:41,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:33:41,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:33:42,092 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/hard-ll_unwindbound100.c[538,551] [2022-03-20 10:33:42,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:33:42,121 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:33:42,130 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/hard-ll_unwindbound100.c[538,551] [2022-03-20 10:33:42,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:33:42,149 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:33:42,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42 WrapperNode [2022-03-20 10:33:42,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:33:42,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:33:42,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:33:42,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:33:42,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:33:42,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:33:42,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:33:42,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:33:42,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:33:42,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:42,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 10:33:42,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 10:33:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:33:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:33:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:33:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:33:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:33:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:33:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:33:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:33:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:33:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:33:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:33:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:33:42,276 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:33:42,277 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:33:42,369 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:33:42,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:33:42,373 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 10:33:42,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:42 BoogieIcfgContainer [2022-03-20 10:33:42,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:33:42,375 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:33:42,375 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:33:42,376 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:33:42,378 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:42" (1/1) ... [2022-03-20 10:33:42,379 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:33:42,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:33:42 BasicIcfg [2022-03-20 10:33:42,393 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:33:42,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:33:42,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:33:42,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:33:42,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:33:41" (1/4) ... [2022-03-20 10:33:42,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6097927a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:33:42, skipping insertion in model container [2022-03-20 10:33:42,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:33:42" (2/4) ... [2022-03-20 10:33:42,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6097927a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:33:42, skipping insertion in model container [2022-03-20 10:33:42,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:33:42" (3/4) ... [2022-03-20 10:33:42,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6097927a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:33:42, skipping insertion in model container [2022-03-20 10:33:42,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:33:42" (4/4) ... [2022-03-20 10:33:42,397 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound100.cqvasr [2022-03-20 10:33:42,401 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:33:42,401 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:33:42,430 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:33:42,434 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 10:33:42,434 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:33:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 10:33:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 10:33:42,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:42,449 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:42,450 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-20 10:33:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:42,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288726272] [2022-03-20 10:33:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:42,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:42,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:42,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288726272] [2022-03-20 10:33:42,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288726272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:42,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:42,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:33:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476774596] [2022-03-20 10:33:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:42,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:33:42,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:42,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:33:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:33:42,649 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:42,750 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-20 10:33:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:33:42,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 10:33:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:42,758 INFO L225 Difference]: With dead ends: 66 [2022-03-20 10:33:42,759 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 10:33:42,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:33:42,766 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:42,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 10:33:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 10:33:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 10:33:42,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-20 10:33:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:42,806 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 10:33:42,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 10:33:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 10:33:42,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:42,808 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:42,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:33:42,808 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-20 10:33:42,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:42,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771556689] [2022-03-20 10:33:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:42,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771556689] [2022-03-20 10:33:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771556689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:42,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598588656] [2022-03-20 10:33:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:42,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:42,957 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:43,120 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-20 10:33:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:33:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 10:33:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:43,123 INFO L225 Difference]: With dead ends: 47 [2022-03-20 10:33:43,124 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 10:33:43,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:43,125 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:43,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 10:33:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-20 10:33:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-20 10:33:43,133 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-20 10:33:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:43,133 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-20 10:33:43,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 10:33:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-20 10:33:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 10:33:43,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:43,134 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:43,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 10:33:43,134 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-20 10:33:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:43,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986049625] [2022-03-20 10:33:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:43,148 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:43,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348420325] [2022-03-20 10:33:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:43,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:43,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:33:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:33:43,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:43,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:43,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:43,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986049625] [2022-03-20 10:33:43,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:43,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348420325] [2022-03-20 10:33:43,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348420325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:43,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:43,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:33:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944529452] [2022-03-20 10:33:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:43,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:33:43,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:33:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:33:43,343 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 10:33:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:43,352 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-20 10:33:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:33:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 10:33:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:43,353 INFO L225 Difference]: With dead ends: 52 [2022-03-20 10:33:43,353 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 10:33:43,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:33:43,355 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:43,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 10:33:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 10:33:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-20 10:33:43,360 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-20 10:33:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:43,361 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-20 10:33:43,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 10:33:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-20 10:33:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:33:43,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:43,361 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:43,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:43,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:43,575 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-20 10:33:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727611761] [2022-03-20 10:33:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:33:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:33:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 10:33:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:33:43,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:43,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727611761] [2022-03-20 10:33:43,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727611761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:43,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:43,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602977904] [2022-03-20 10:33:43,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:43,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:43,736 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:33:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:43,887 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 10:33:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:33:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:33:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:43,890 INFO L225 Difference]: With dead ends: 52 [2022-03-20 10:33:43,890 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 10:33:43,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:43,898 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:43,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 10:33:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-20 10:33:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:33:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 10:33:43,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-20 10:33:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:43,913 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 10:33:43,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:33:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 10:33:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 10:33:43,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:43,914 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:43,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 10:33:43,914 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-20 10:33:43,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:43,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397033876] [2022-03-20 10:33:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:43,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:43,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208363629] [2022-03-20 10:33:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:43,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:43,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:33:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:33:44,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:44,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:44,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397033876] [2022-03-20 10:33:44,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208363629] [2022-03-20 10:33:44,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208363629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:44,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:44,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:33:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076754558] [2022-03-20 10:33:44,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:44,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:44,106 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:33:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:44,163 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-03-20 10:33:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 10:33:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:44,165 INFO L225 Difference]: With dead ends: 71 [2022-03-20 10:33:44,165 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 10:33:44,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:44,166 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:44,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 10:33:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 10:33:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:33:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-20 10:33:44,178 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-03-20 10:33:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:44,178 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-20 10:33:44,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:33:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-20 10:33:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:33:44,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:44,179 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:44,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:44,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:44,392 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-20 10:33:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:44,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853105709] [2022-03-20 10:33:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:44,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:44,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920586780] [2022-03-20 10:33:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:44,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:44,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:44,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:44,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:33:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:44,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:44,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853105709] [2022-03-20 10:33:44,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920586780] [2022-03-20 10:33:44,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920586780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:44,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:44,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:33:44,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769208221] [2022-03-20 10:33:44,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:44,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:44,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:44,540 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:33:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:44,577 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-03-20 10:33:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-20 10:33:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:44,580 INFO L225 Difference]: With dead ends: 76 [2022-03-20 10:33:44,580 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 10:33:44,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:33:44,581 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:44,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 10:33:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-20 10:33:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:33:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-03-20 10:33:44,605 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-03-20 10:33:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:44,607 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-03-20 10:33:44,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:33:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-03-20 10:33:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:33:44,608 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:44,608 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:44,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:44,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:44,809 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-20 10:33:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959762236] [2022-03-20 10:33:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:44,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507307376] [2022-03-20 10:33:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:44,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:44,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:44,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:44,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:33:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:44,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:33:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:44,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:33:44,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:44,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959762236] [2022-03-20 10:33:44,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:44,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507307376] [2022-03-20 10:33:44,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507307376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:33:44,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:33:44,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:33:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729771937] [2022-03-20 10:33:44,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:44,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:33:44,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:44,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:33:44,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:33:44,989 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:45,059 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-20 10:33:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:33:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 10:33:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:45,060 INFO L225 Difference]: With dead ends: 74 [2022-03-20 10:33:45,061 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 10:33:45,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:33:45,061 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:45,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 10:33:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 10:33:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 10:33:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-20 10:33:45,066 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-03-20 10:33:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:45,066 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-20 10:33:45,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-20 10:33:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 10:33:45,067 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:45,067 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:45,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:45,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:45,285 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-20 10:33:45,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:45,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362450159] [2022-03-20 10:33:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:45,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:45,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:45,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560301082] [2022-03-20 10:33:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:45,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:45,294 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:33:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:33:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:45,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:33:45,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362450159] [2022-03-20 10:33:45,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560301082] [2022-03-20 10:33:45,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560301082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:33:45,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:33:45,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 10:33:45,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755338698] [2022-03-20 10:33:45,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:33:45,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:33:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:33:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:33:45,485 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:33:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:45,561 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-03-20 10:33:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:33:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-20 10:33:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:45,562 INFO L225 Difference]: With dead ends: 123 [2022-03-20 10:33:45,562 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 10:33:45,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:33:45,563 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:45,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 10:33:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-03-20 10:33:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 10:33:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-03-20 10:33:45,571 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-03-20 10:33:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:45,571 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-03-20 10:33:45,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:33:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-03-20 10:33:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 10:33:45,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:45,572 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:45,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:45,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:45,787 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-20 10:33:45,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168004535] [2022-03-20 10:33:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:45,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:45,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991814398] [2022-03-20 10:33:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:45,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:45,797 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:45,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:33:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 10:33:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 10:33:46,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 10:33:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168004535] [2022-03-20 10:33:46,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991814398] [2022-03-20 10:33:46,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991814398] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:33:46,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:33:46,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 10:33:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29347744] [2022-03-20 10:33:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:33:46,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:33:46,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:33:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:46,133 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:46,195 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-03-20 10:33:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:33:46,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-03-20 10:33:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:46,198 INFO L225 Difference]: With dead ends: 120 [2022-03-20 10:33:46,198 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 10:33:46,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:33:46,198 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:46,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:33:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 10:33:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-03-20 10:33:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 10:33:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-03-20 10:33:46,205 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-03-20 10:33:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:46,206 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-03-20 10:33:46,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:33:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-03-20 10:33:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 10:33:46,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:46,207 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:46,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 10:33:46,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:46,419 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-03-20 10:33:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:46,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187519268] [2022-03-20 10:33:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:46,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:46,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352886645] [2022-03-20 10:33:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:46,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:46,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:46,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:46,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:33:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:33:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 10:33:46,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 10:33:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187519268] [2022-03-20 10:33:46,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352886645] [2022-03-20 10:33:46,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352886645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:33:46,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:33:46,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 10:33:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599045031] [2022-03-20 10:33:46,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:33:46,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:33:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:33:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:46,670 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 10:33:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:46,806 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-03-20 10:33:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 10:33:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-03-20 10:33:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:46,808 INFO L225 Difference]: With dead ends: 207 [2022-03-20 10:33:46,808 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 10:33:46,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:33:46,809 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:46,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 224 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 10:33:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-03-20 10:33:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 10:33:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-03-20 10:33:46,823 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-03-20 10:33:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:46,823 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-03-20 10:33:46,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 10:33:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-03-20 10:33:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 10:33:46,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:46,826 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:46,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 10:33:47,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:47,040 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-03-20 10:33:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:47,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975974788] [2022-03-20 10:33:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:47,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:47,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765358545] [2022-03-20 10:33:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:47,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:47,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:47,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:47,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:33:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:33:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 10:33:47,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:33:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 10:33:47,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:33:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975974788] [2022-03-20 10:33:47,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:33:47,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765358545] [2022-03-20 10:33:47,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765358545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:33:47,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:33:47,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 10:33:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487172397] [2022-03-20 10:33:47,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:33:47,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:33:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:33:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:33:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:33:47,545 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:33:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:33:47,753 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2022-03-20 10:33:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:33:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-03-20 10:33:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:33:47,755 INFO L225 Difference]: With dead ends: 268 [2022-03-20 10:33:47,755 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 10:33:47,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:33:47,756 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:33:47,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:33:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 10:33:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-03-20 10:33:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 10:33:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-03-20 10:33:47,771 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-03-20 10:33:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:33:47,771 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-03-20 10:33:47,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:33:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-03-20 10:33:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 10:33:47,772 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:33:47,772 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:33:47,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:33:47,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 10:33:47,988 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:33:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:33:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-03-20 10:33:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:33:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699550158] [2022-03-20 10:33:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:33:47,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:33:47,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472508151] [2022-03-20 10:33:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:33:47,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:33:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:33:47,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:33:47,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:33:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:33:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 10:33:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:33:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 10:33:48,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:34:15,127 WARN L232 SmtUtils]: Spent 15.16s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:35:23,123 WARN L232 SmtUtils]: Spent 19.48s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:36:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 10:36:36,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:36:36,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699550158] [2022-03-20 10:36:36,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:36:36,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472508151] [2022-03-20 10:36:36,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472508151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:36:36,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:36:36,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 10:36:36,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631290730] [2022-03-20 10:36:36,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:36:36,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 10:36:36,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:36:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 10:36:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:36:36,634 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 10:36:38,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:36:54,532 WARN L232 SmtUtils]: Spent 14.76s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:36:58,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:37:19,248 WARN L232 SmtUtils]: Spent 19.55s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:25,795 WARN L232 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:34,874 WARN L232 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:36,834 INFO L93 Difference]: Finished difference Result 369 states and 471 transitions. [2022-03-20 10:37:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 10:37:36,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-03-20 10:37:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:36,838 INFO L225 Difference]: With dead ends: 369 [2022-03-20 10:37:36,838 INFO L226 Difference]: Without dead ends: 293 [2022-03-20 10:37:36,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2022-03-20 10:37:36,841 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:36,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 350 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 415 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-03-20 10:37:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-20 10:37:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-03-20 10:37:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 10:37:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-03-20 10:37:36,857 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-03-20 10:37:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:36,857 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-03-20 10:37:36,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 10:37:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-03-20 10:37:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 10:37:36,858 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:36,858 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:36,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:37,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:37,060 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-03-20 10:37:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:37,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617569768] [2022-03-20 10:37:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:37,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:37,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195180497] [2022-03-20 10:37:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:37,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 10:37:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:37:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 10:37:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 10:37:37,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:39,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:39,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617569768] [2022-03-20 10:37:39,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:39,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195180497] [2022-03-20 10:37:39,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195180497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:37:39,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:37:39,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 10:37:39,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477054862] [2022-03-20 10:37:39,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:39,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 10:37:39,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 10:37:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:37:39,855 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 10:37:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:40,754 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2022-03-20 10:37:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 10:37:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-03-20 10:37:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:40,756 INFO L225 Difference]: With dead ends: 350 [2022-03-20 10:37:40,756 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 10:37:40,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-20 10:37:40,757 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:40,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 10:37:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 10:37:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-03-20 10:37:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 10:37:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-03-20 10:37:40,775 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-03-20 10:37:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:40,775 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-03-20 10:37:40,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 10:37:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-03-20 10:37:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 10:37:40,776 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:40,776 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:40,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:40,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 10:37:40,980 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-03-20 10:37:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710668079] [2022-03-20 10:37:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:40,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:40,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968656431] [2022-03-20 10:37:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:37:40,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:40,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:40,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 10:37:41,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:37:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:37:41,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:37:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 10:37:41,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 10:37:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710668079] [2022-03-20 10:37:41,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968656431] [2022-03-20 10:37:41,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968656431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:37:41,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:37:41,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-20 10:37:41,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898003613] [2022-03-20 10:37:41,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:41,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:37:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:37:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:41,256 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 10:37:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:41,299 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2022-03-20 10:37:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:37:41,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-03-20 10:37:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:41,300 INFO L225 Difference]: With dead ends: 306 [2022-03-20 10:37:41,300 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 10:37:41,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:41,301 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:41,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 141 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:37:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 10:37:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-03-20 10:37:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 10:37:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-03-20 10:37:41,316 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-03-20 10:37:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:41,316 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-03-20 10:37:41,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 10:37:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-03-20 10:37:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 10:37:41,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:41,317 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:41,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:41,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 10:37:41,531 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-03-20 10:37:41,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:41,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680435827] [2022-03-20 10:37:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:41,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:41,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774842572] [2022-03-20 10:37:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:41,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:41,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:41,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 10:37:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:37:41,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:37:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 10:37:41,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:37:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 10:37:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680435827] [2022-03-20 10:37:42,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774842572] [2022-03-20 10:37:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774842572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:37:42,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:37:42,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 10:37:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249032544] [2022-03-20 10:37:42,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:37:42,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 10:37:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 10:37:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:37:42,080 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 10:37:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:42,271 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2022-03-20 10:37:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:37:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-03-20 10:37:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:42,272 INFO L225 Difference]: With dead ends: 254 [2022-03-20 10:37:42,272 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 10:37:42,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:37:42,273 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:42,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 296 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:37:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 10:37:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-20 10:37:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 10:37:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-03-20 10:37:42,287 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-03-20 10:37:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:42,287 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-03-20 10:37:42,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 10:37:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-03-20 10:37:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 10:37:42,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:42,288 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:42,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:42,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 10:37:42,499 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-03-20 10:37:42,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:42,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409165778] [2022-03-20 10:37:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:42,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:42,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187032516] [2022-03-20 10:37:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:42,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:42,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:42,507 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:42,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 10:37:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:37:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 10:37:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 10:37:42,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:37:42,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:37:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409165778] [2022-03-20 10:37:42,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:37:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187032516] [2022-03-20 10:37:42,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187032516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:37:42,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:37:42,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:37:42,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378766350] [2022-03-20 10:37:42,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:37:42,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:37:42,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:37:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:37:42,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:42,684 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:37:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:42,740 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-03-20 10:37:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:37:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-03-20 10:37:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:42,742 INFO L225 Difference]: With dead ends: 249 [2022-03-20 10:37:42,742 INFO L226 Difference]: Without dead ends: 228 [2022-03-20 10:37:42,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:37:42,742 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:42,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:37:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-20 10:37:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-03-20 10:37:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 10:37:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-03-20 10:37:42,758 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-03-20 10:37:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:42,758 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-03-20 10:37:42,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:37:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-03-20 10:37:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 10:37:42,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:42,759 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:42,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:42,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 10:37:42,977 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-03-20 10:37:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5855626] [2022-03-20 10:37:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:42,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:42,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656167044] [2022-03-20 10:37:42,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:37:42,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:42,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:42,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:42,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 10:37:43,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 10:37:43,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:37:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 10:37:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:37:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 10:37:44,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:38:12,566 WARN L232 SmtUtils]: Spent 12.87s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:40:17,043 WARN L232 SmtUtils]: Spent 38.27s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:45:12,096 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse10 (mod c_main_~B~0 4294967296))) (let ((.cse0 (* c_main_~p~0 .cse10))) (or (not (= c_main_~d~0 .cse0)) (let ((.cse13 (div (* 2 c_main_~p~0) 2))) (let ((.cse11 (div .cse13 2)) (.cse6 (= (mod .cse13 2) 0)) (.cse12 (* .cse10 .cse13))) (let ((.cse1 (< .cse0 0)) (.cse2 (= (mod .cse12 2) 0)) (.cse8 (not .cse6)) (.cse9 (* (+ c_main_~q~0 .cse11) .cse10)) (.cse4 (* (- 1) (div .cse12 2))) (.cse5 (* .cse10 (+ c_main_~q~0 .cse11 1))) (.cse3 (mod c_main_~A~0 4294967296))) (and (or (and .cse1 (not .cse2)) (let ((.cse7 (< c_main_~p~0 0))) (and (or (= .cse3 (+ .cse4 c_main_~r~0 .cse5)) .cse6 (not .cse7)) (or (and .cse8 .cse7) (= (+ .cse4 .cse9 c_main_~r~0) .cse3))))) (or (not .cse1) .cse2 (and (or .cse8 (= (+ (- 1) .cse4 .cse9 c_main_~r~0) .cse3)) (or .cse6 (= (+ (- 1) .cse4 c_main_~r~0 .cse5) .cse3))))))))))) is different from true [2022-03-20 10:46:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 19 refuted. 0 times theorem prover too weak. 276 trivial. 12 not checked. [2022-03-20 10:46:12,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:46:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5855626] [2022-03-20 10:46:12,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:46:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656167044] [2022-03-20 10:46:12,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656167044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:46:12,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:46:12,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-20 10:46:12,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750300563] [2022-03-20 10:46:12,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:46:12,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 10:46:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:46:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 10:46:12,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=379, Unknown=5, NotChecked=40, Total=506 [2022-03-20 10:46:12,604 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-20 10:46:14,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:46:17,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:01,705 WARN L232 SmtUtils]: Spent 43.89s on a formula simplification. DAG size of input: 185 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:47:04,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:47:14,676 WARN L232 SmtUtils]: Spent 8.60s on a formula simplification. DAG size of input: 58 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:47:29,651 WARN L232 SmtUtils]: Spent 12.97s on a formula simplification. DAG size of input: 129 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:48:16,620 WARN L232 SmtUtils]: Spent 31.37s on a formula simplification. DAG size of input: 150 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)