/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:58:39,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:58:39,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:58:39,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:58:39,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:58:39,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:58:39,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:58:39,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:58:39,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:58:39,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:58:39,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:58:39,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:58:39,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:58:39,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:58:39,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:58:39,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:58:39,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:58:39,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:58:39,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:58:39,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:58:39,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:58:39,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:58:39,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:58:39,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:58:39,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-14 22:58:39,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-14 22:58:39,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-14 22:58:39,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-14 22:58:39,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-14 22:58:39,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-14 22:58:39,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:58:39,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:58:39,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:58:39,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:58:39,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:58:39,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:58:39,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:58:39,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:58:39,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:58:39,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:58:39,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:58:39,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:58:39,249 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:58:39,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:58:39,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:58:39,250 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:58:39,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:58:39,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:58:39,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:58:39,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:58:39,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:58:39,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:58:39,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:58:39,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:58:39,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:58:39,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:58:39,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:58:39,253 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:58:39,253 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:58:39,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:58:39,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:58:39,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:58:39,462 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:58:39,462 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:58:39,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-02-14 22:58:39,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7411549/e92051b3ac84401f87a550e99bdaec38/FLAG9cef60fb8 [2022-02-14 22:58:39,807 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:58:39,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-02-14 22:58:39,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7411549/e92051b3ac84401f87a550e99bdaec38/FLAG9cef60fb8 [2022-02-14 22:58:40,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7411549/e92051b3ac84401f87a550e99bdaec38 [2022-02-14 22:58:40,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:58:40,243 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:58:40,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:58:40,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:58:40,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:58:40,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6183453e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40, skipping insertion in model container [2022-02-14 22:58:40,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:58:40,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:58:40,374 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/fermat1-ll_unwindbound50.c[535,548] [2022-02-14 22:58:40,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:58:40,400 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:58:40,419 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/fermat1-ll_unwindbound50.c[535,548] [2022-02-14 22:58:40,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:58:40,433 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:58:40,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40 WrapperNode [2022-02-14 22:58:40,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:58:40,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:58:40,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:58:40,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:58:40,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:58:40,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:58:40,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:58:40,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:58:40,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:58:40,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:40,476 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) [2022-02-14 22:58:40,483 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 [2022-02-14 22:58:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:58:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:58:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:58:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:58:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:58:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:58:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:58:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:58:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:58:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:58:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:58:40,549 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:58:40,550 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:58:40,717 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:58:40,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:58:40,722 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 22:58:40,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:58:40 BoogieIcfgContainer [2022-02-14 22:58:40,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:58:40,724 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:58:40,724 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:58:40,729 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:58:40,731 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:58:40" (1/1) ... [2022-02-14 22:58:40,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:58:40 BasicIcfg [2022-02-14 22:58:40,761 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:58:40,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:58:40,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:58:40,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:58:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:58:40" (1/4) ... [2022-02-14 22:58:40,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e70da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:58:40, skipping insertion in model container [2022-02-14 22:58:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:58:40" (2/4) ... [2022-02-14 22:58:40,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e70da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:58:40, skipping insertion in model container [2022-02-14 22:58:40,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:58:40" (3/4) ... [2022-02-14 22:58:40,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e70da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:58:40, skipping insertion in model container [2022-02-14 22:58:40,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:58:40" (4/4) ... [2022-02-14 22:58:40,770 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.cJordan [2022-02-14 22:58:40,774 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:58:40,774 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:58:40,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:58:40,811 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:58:40,811 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:58:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 22:58:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 22:58:40,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:40,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:40,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-02-14 22:58:40,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:40,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807047248] [2022-02-14 22:58:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:40,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:40,921 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:40,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005740748] [2022-02-14 22:58:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:40,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:40,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:40,928 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) [2022-02-14 22:58:40,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:58:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:40,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-14 22:58:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 22:58:41,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:58:41,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:41,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807047248] [2022-02-14 22:58:41,047 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:41,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005740748] [2022-02-14 22:58:41,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005740748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:58:41,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:58:41,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-14 22:58:41,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790410354] [2022-02-14 22:58:41,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:58:41,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-14 22:58:41,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-14 22:58:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-14 22:58:41,077 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:58:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:41,089 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-02-14 22:58:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-14 22:58:41,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-14 22:58:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:41,095 INFO L225 Difference]: With dead ends: 37 [2022-02-14 22:58:41,096 INFO L226 Difference]: Without dead ends: 32 [2022-02-14 22:58:41,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-14 22:58:41,101 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:41,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:58:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-14 22:58:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-14 22:58:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:58:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-14 22:58:41,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-02-14 22:58:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:41,131 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-14 22:58:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:58:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-14 22:58:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:58:41,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:41,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:41,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-02-14 22:58:41,340 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-02-14 22:58:41,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:41,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559587695] [2022-02-14 22:58:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:41,350 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:41,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366887332] [2022-02-14 22:58:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:41,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:41,352 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) [2022-02-14 22:58:41,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:58:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 22:58:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:41,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:58:41,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:41,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559587695] [2022-02-14 22:58:41,459 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:41,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366887332] [2022-02-14 22:58:41,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366887332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:58:41,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:58:41,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:58:41,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171139530] [2022-02-14 22:58:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:58:41,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:58:41,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:58:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:58:41,461 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:58:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:41,477 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-02-14 22:58:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 22:58:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 22:58:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:41,478 INFO L225 Difference]: With dead ends: 34 [2022-02-14 22:58:41,478 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 22:58:41,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:58:41,479 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:41,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:58:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 22:58:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-14 22:58:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:58:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-02-14 22:58:41,483 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-02-14 22:58:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:41,484 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-02-14 22:58:41,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:58:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-02-14 22:58:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:58:41,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:41,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:41,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:41,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-02-14 22:58:41,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-02-14 22:58:41,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:41,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282914375] [2022-02-14 22:58:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:41,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:41,710 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:41,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346029221] [2022-02-14 22:58:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:41,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:41,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:41,718 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) [2022-02-14 22:58:41,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:58:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:58:41,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:51,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:58:51,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:51,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282914375] [2022-02-14 22:58:51,676 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:51,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346029221] [2022-02-14 22:58:51,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346029221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:58:51,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:58:51,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:58:51,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749374198] [2022-02-14 22:58:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:58:51,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:58:51,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:58:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:58:51,677 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:58:52,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:55,180 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 [] [2022-02-14 22:58:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:55,195 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-02-14 22:58:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:58:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-14 22:58:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:55,196 INFO L225 Difference]: With dead ends: 51 [2022-02-14 22:58:55,196 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 22:58:55,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:58:55,197 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:55,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-02-14 22:58:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 22:58:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-14 22:58:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:58:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-02-14 22:58:55,207 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-02-14 22:58:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:55,207 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-02-14 22:58:55,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:58:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-02-14 22:58:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 22:58:55,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:55,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:55,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:55,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:55,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-02-14 22:58:55,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:55,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886643639] [2022-02-14 22:58:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:55,420 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:55,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924002118] [2022-02-14 22:58:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:55,422 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) [2022-02-14 22:58:55,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:58:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:55,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 22:58:55,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:55,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:55,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:55,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886643639] [2022-02-14 22:58:55,647 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:55,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924002118] [2022-02-14 22:58:55,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924002118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:55,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:55,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-14 22:58:55,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023852162] [2022-02-14 22:58:55,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:55,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:58:55,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:55,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:58:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:58:55,649 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:58:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:55,743 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-02-14 22:58:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:58:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-02-14 22:58:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:55,744 INFO L225 Difference]: With dead ends: 55 [2022-02-14 22:58:55,744 INFO L226 Difference]: Without dead ends: 52 [2022-02-14 22:58:55,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:58:55,745 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:55,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 157 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:58:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-14 22:58:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-02-14 22:58:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:58:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-14 22:58:55,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-02-14 22:58:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:55,749 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-14 22:58:55,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:58:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-14 22:58:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-14 22:58:55,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:55,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:55,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:55,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:55,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-02-14 22:58:55,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:55,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965450201] [2022-02-14 22:58:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:55,958 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:55,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431786845] [2022-02-14 22:58:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:55,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:55,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:55,960 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) [2022-02-14 22:58:55,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:58:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:58:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:56,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:58:56,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:56,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965450201] [2022-02-14 22:58:56,074 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:56,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431786845] [2022-02-14 22:58:56,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431786845] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:58:56,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:58:56,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:58:56,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397700749] [2022-02-14 22:58:56,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:58:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:58:56,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:58:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:58:56,077 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:58:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:56,098 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-02-14 22:58:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:58:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-02-14 22:58:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:56,101 INFO L225 Difference]: With dead ends: 44 [2022-02-14 22:58:56,101 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 22:58:56,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:58:56,104 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:56,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:58:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 22:58:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-14 22:58:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 22:58:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-14 22:58:56,118 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-02-14 22:58:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:56,119 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-14 22:58:56,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:58:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-14 22:58:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 22:58:56,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:56,122 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:56,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-14 22:58:56,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:56,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-02-14 22:58:56,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:56,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266226260] [2022-02-14 22:58:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:56,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:56,349 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:56,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112183915] [2022-02-14 22:58:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:56,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:56,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:56,350 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) [2022-02-14 22:58:56,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:58:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:58:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:56,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:58:56,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:56,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266226260] [2022-02-14 22:58:56,573 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:56,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112183915] [2022-02-14 22:58:56,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112183915] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:58:56,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:58:56,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-02-14 22:58:56,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539563943] [2022-02-14 22:58:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:58:56,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:58:56,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:58:56,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:58:56,574 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 22:58:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:56,601 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-02-14 22:58:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:58:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-02-14 22:58:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:56,602 INFO L225 Difference]: With dead ends: 53 [2022-02-14 22:58:56,602 INFO L226 Difference]: Without dead ends: 53 [2022-02-14 22:58:56,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:58:56,603 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:56,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:58:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-14 22:58:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-14 22:58:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 22:58:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-02-14 22:58:56,606 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-02-14 22:58:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:56,606 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-02-14 22:58:56,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 22:58:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-02-14 22:58:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-14 22:58:56,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:56,607 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:56,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:56,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:56,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-02-14 22:58:56,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:56,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613426502] [2022-02-14 22:58:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:56,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:56,829 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:56,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834022459] [2022-02-14 22:58:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:56,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:56,836 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) [2022-02-14 22:58:56,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:58:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:58:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:56,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:58:57,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:57,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613426502] [2022-02-14 22:58:57,050 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:57,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834022459] [2022-02-14 22:58:57,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834022459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:57,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:57,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 22:58:57,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951607502] [2022-02-14 22:58:57,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:57,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:58:57,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:58:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:58:57,051 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-14 22:58:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:57,150 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-02-14 22:58:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:58:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-02-14 22:58:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:57,151 INFO L225 Difference]: With dead ends: 108 [2022-02-14 22:58:57,151 INFO L226 Difference]: Without dead ends: 108 [2022-02-14 22:58:57,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:58:57,152 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:57,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 224 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:58:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-14 22:58:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-02-14 22:58:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:58:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-02-14 22:58:57,158 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-02-14 22:58:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:57,158 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-02-14 22:58:57,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-14 22:58:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-02-14 22:58:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:58:57,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:57,159 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:57,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:57,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:57,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-02-14 22:58:57,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:57,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606703695] [2022-02-14 22:58:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:57,382 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:57,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225967165] [2022-02-14 22:58:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:57,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:57,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:57,384 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) [2022-02-14 22:58:57,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:58:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 22:58:57,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 22:58:57,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:58:57,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:57,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606703695] [2022-02-14 22:58:57,489 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:57,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225967165] [2022-02-14 22:58:57,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225967165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:58:57,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:58:57,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:58:57,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799700797] [2022-02-14 22:58:57,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:58:57,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:58:57,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:58:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:58:57,490 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:58:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:57,515 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-02-14 22:58:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 22:58:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-02-14 22:58:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:57,519 INFO L225 Difference]: With dead ends: 119 [2022-02-14 22:58:57,519 INFO L226 Difference]: Without dead ends: 119 [2022-02-14 22:58:57,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:58:57,519 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:57,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 98 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:58:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-14 22:58:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-02-14 22:58:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 22:58:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-02-14 22:58:57,543 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-02-14 22:58:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:57,543 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-02-14 22:58:57,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:58:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-02-14 22:58:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 22:58:57,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:57,545 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:57,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:57,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-02-14 22:58:57,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-02-14 22:58:57,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:57,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718459779] [2022-02-14 22:58:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:57,766 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:57,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359278016] [2022-02-14 22:58:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:57,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:57,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:57,769 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) [2022-02-14 22:58:57,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:58:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 22:58:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:57,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 22:58:58,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:58,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718459779] [2022-02-14 22:58:58,008 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:58,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359278016] [2022-02-14 22:58:58,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359278016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:58,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:58,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-14 22:58:58,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322689669] [2022-02-14 22:58:58,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:58,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 22:58:58,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 22:58:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:58:58,010 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-14 22:58:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:58,136 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-02-14 22:58:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 22:58:58,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-02-14 22:58:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:58,137 INFO L225 Difference]: With dead ends: 172 [2022-02-14 22:58:58,137 INFO L226 Difference]: Without dead ends: 172 [2022-02-14 22:58:58,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-02-14 22:58:58,138 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 121 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:58,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 205 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:58:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-14 22:58:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-02-14 22:58:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 22:58:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-02-14 22:58:58,144 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-02-14 22:58:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:58,145 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-02-14 22:58:58,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-14 22:58:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-02-14 22:58:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 22:58:58,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:58,146 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:58,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:58,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:58,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-02-14 22:58:58,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:58,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698964197] [2022-02-14 22:58:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:58,357 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:58,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878238123] [2022-02-14 22:58:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:58,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:58,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:58,359 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) [2022-02-14 22:58:58,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 22:58:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:58:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:58:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 22:58:58,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:58,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698964197] [2022-02-14 22:58:58,641 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:58,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878238123] [2022-02-14 22:58:58,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878238123] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:58,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:58,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 22:58:58,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93608495] [2022-02-14 22:58:58,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:58,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 22:58:58,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:58,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 22:58:58,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:58:58,643 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 22:58:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:58,816 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-02-14 22:58:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 22:58:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-02-14 22:58:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:58,817 INFO L225 Difference]: With dead ends: 206 [2022-02-14 22:58:58,817 INFO L226 Difference]: Without dead ends: 206 [2022-02-14 22:58:58,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-02-14 22:58:58,818 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 204 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:58,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 245 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:58:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-14 22:58:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-02-14 22:58:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-14 22:58:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-02-14 22:58:58,824 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-02-14 22:58:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:58,825 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-02-14 22:58:58,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 22:58:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-02-14 22:58:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:58:58,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:58,826 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 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] [2022-02-14 22:58:58,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:59,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 22:58:59,039 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-02-14 22:58:59,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:59,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019965120] [2022-02-14 22:58:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:59,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:59,047 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:59,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512576779] [2022-02-14 22:58:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:59,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:59,048 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) [2022-02-14 22:58:59,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 22:58:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:59,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 22:58:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-02-14 22:58:59,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-02-14 22:58:59,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:59,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019965120] [2022-02-14 22:58:59,310 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:59,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512576779] [2022-02-14 22:58:59,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512576779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:59,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:59,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-02-14 22:58:59,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463253596] [2022-02-14 22:58:59,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:59,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:58:59,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:58:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:58:59,311 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-14 22:58:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:59,335 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-02-14 22:58:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:58:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-02-14 22:58:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:59,337 INFO L225 Difference]: With dead ends: 381 [2022-02-14 22:58:59,337 INFO L226 Difference]: Without dead ends: 359 [2022-02-14 22:58:59,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:58:59,338 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:59,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:58:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-14 22:58:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-02-14 22:58:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-02-14 22:58:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-02-14 22:58:59,348 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-02-14 22:58:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:59,348 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-02-14 22:58:59,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-14 22:58:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-02-14 22:58:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:58:59,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:59,350 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-02-14 22:58:59,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 22:58:59,563 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-02-14 22:58:59,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:59,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286962532] [2022-02-14 22:58:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:59,571 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:59,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777324450] [2022-02-14 22:58:59,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:58:59,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:59,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:59,575 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) [2022-02-14 22:58:59,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 22:58:59,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:58:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:58:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:58:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-02-14 22:58:59,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:59,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286962532] [2022-02-14 22:58:59,972 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:59,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777324450] [2022-02-14 22:58:59,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777324450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:59,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:59,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-02-14 22:58:59,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854583818] [2022-02-14 22:58:59,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:59,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 22:58:59,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 22:58:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-14 22:58:59,974 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-02-14 22:59:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:00,363 INFO L93 Difference]: Finished difference Result 842 states and 1155 transitions. [2022-02-14 22:59:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-14 22:59:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-02-14 22:59:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:00,367 INFO L225 Difference]: With dead ends: 842 [2022-02-14 22:59:00,367 INFO L226 Difference]: Without dead ends: 842 [2022-02-14 22:59:00,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 22:59:00,368 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 350 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:00,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 469 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:59:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-02-14 22:59:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-02-14 22:59:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-02-14 22:59:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-02-14 22:59:00,391 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-02-14 22:59:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:00,391 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-02-14 22:59:00,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-02-14 22:59:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-02-14 22:59:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 22:59:00,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:00,392 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-02-14 22:59:00,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:00,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 22:59:00,609 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-02-14 22:59:00,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:00,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342692657] [2022-02-14 22:59:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:00,616 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:00,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534817739] [2022-02-14 22:59:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:00,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:00,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:00,617 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) [2022-02-14 22:59:00,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 22:59:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:59:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 22:59:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:59:00,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-02-14 22:59:01,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:01,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342692657] [2022-02-14 22:59:01,108 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:01,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534817739] [2022-02-14 22:59:01,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534817739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:01,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:01,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-02-14 22:59:01,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480674906] [2022-02-14 22:59:01,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:01,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-14 22:59:01,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-14 22:59:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-14 22:59:01,110 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-02-14 22:59:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:01,667 INFO L93 Difference]: Finished difference Result 819 states and 1083 transitions. [2022-02-14 22:59:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 22:59:01,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-02-14 22:59:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:01,670 INFO L225 Difference]: With dead ends: 819 [2022-02-14 22:59:01,670 INFO L226 Difference]: Without dead ends: 795 [2022-02-14 22:59:01,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 22:59:01,671 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 697 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:01,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 528 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 22:59:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-14 22:59:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-02-14 22:59:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-02-14 22:59:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-02-14 22:59:01,689 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-02-14 22:59:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-02-14 22:59:01,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-02-14 22:59:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-02-14 22:59:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-14 22:59:01,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:01,691 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-02-14 22:59:01,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:01,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 22:59:01,899 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-02-14 22:59:01,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:01,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698343818] [2022-02-14 22:59:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:01,906 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:01,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346482459] [2022-02-14 22:59:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:01,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:01,907 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) [2022-02-14 22:59:01,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 22:59:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:59:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 22:59:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:59:02,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-14 22:59:02,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:02,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698343818] [2022-02-14 22:59:02,465 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:02,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346482459] [2022-02-14 22:59:02,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346482459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:02,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:02,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-14 22:59:02,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404069294] [2022-02-14 22:59:02,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:02,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 22:59:02,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 22:59:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-14 22:59:02,467 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-14 22:59:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:02,970 INFO L93 Difference]: Finished difference Result 845 states and 1130 transitions. [2022-02-14 22:59:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-14 22:59:02,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 103 [2022-02-14 22:59:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:02,973 INFO L225 Difference]: With dead ends: 845 [2022-02-14 22:59:02,973 INFO L226 Difference]: Without dead ends: 845 [2022-02-14 22:59:02,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-02-14 22:59:02,974 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 603 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:02,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 442 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 22:59:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-02-14 22:59:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 830. [2022-02-14 22:59:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 621 states have (on average 1.1996779388083736) internal successors, (745), 627 states have internal predecessors, (745), 184 states have call successors, (184), 26 states have call predecessors, (184), 24 states have return successors, (182), 176 states have call predecessors, (182), 182 states have call successors, (182) [2022-02-14 22:59:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2022-02-14 22:59:03,000 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 103 [2022-02-14 22:59:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:03,001 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2022-02-14 22:59:03,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-14 22:59:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2022-02-14 22:59:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-02-14 22:59:03,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:03,004 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:03,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:03,220 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -872608014, now seen corresponding path program 3 times [2022-02-14 22:59:03,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:03,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028884916] [2022-02-14 22:59:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:03,233 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:03,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644646997] [2022-02-14 22:59:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:59:03,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:03,235 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:03,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 22:59:03,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 22:59:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 22:59:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-02-14 22:59:03,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:59:03,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:03,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028884916] [2022-02-14 22:59:03,478 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:03,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644646997] [2022-02-14 22:59:03,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644646997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:59:03,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:59:03,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 22:59:03,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896771551] [2022-02-14 22:59:03,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:59:03,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:59:03,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:59:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:59:03,479 INFO L87 Difference]: Start difference. First operand 830 states and 1111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:59:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:03,516 INFO L93 Difference]: Finished difference Result 946 states and 1238 transitions. [2022-02-14 22:59:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:59:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 181 [2022-02-14 22:59:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:03,520 INFO L225 Difference]: With dead ends: 946 [2022-02-14 22:59:03,520 INFO L226 Difference]: Without dead ends: 896 [2022-02-14 22:59:03,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:59:03,520 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:03,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:59:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-14 22:59:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-02-14 22:59:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 645 states have (on average 1.1767441860465115) internal successors, (759), 652 states have internal predecessors, (759), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 177 states have call predecessors, (184), 184 states have call successors, (184) [2022-02-14 22:59:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1129 transitions. [2022-02-14 22:59:03,535 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1129 transitions. Word has length 181 [2022-02-14 22:59:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:03,535 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1129 transitions. [2022-02-14 22:59:03,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:59:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1129 transitions. [2022-02-14 22:59:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:03,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:03,538 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:03,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-14 22:59:03,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-14 22:59:03,751 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash 121372368, now seen corresponding path program 4 times [2022-02-14 22:59:03,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:03,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138717244] [2022-02-14 22:59:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:03,759 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:03,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121994569] [2022-02-14 22:59:03,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 22:59:03,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:03,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:03,760 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 22:59:03,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 22:59:03,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-02-14 22:59:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-02-14 22:59:04,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:59:04,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:04,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138717244] [2022-02-14 22:59:04,005 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:04,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121994569] [2022-02-14 22:59:04,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121994569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:59:04,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:59:04,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:59:04,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546987909] [2022-02-14 22:59:04,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:59:04,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:59:04,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:59:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:59:04,006 INFO L87 Difference]: Start difference. First operand 861 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-14 22:59:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:04,018 INFO L93 Difference]: Finished difference Result 1075 states and 1408 transitions. [2022-02-14 22:59:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:59:04,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 187 [2022-02-14 22:59:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:04,021 INFO L225 Difference]: With dead ends: 1075 [2022-02-14 22:59:04,021 INFO L226 Difference]: Without dead ends: 919 [2022-02-14 22:59:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:59:04,022 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:04,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:59:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-14 22:59:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 867. [2022-02-14 22:59:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 651 states have (on average 1.1751152073732718) internal successors, (765), 660 states have internal predecessors, (765), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 175 states have call predecessors, (184), 184 states have call successors, (184) [2022-02-14 22:59:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1135 transitions. [2022-02-14 22:59:04,037 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1135 transitions. Word has length 187 [2022-02-14 22:59:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1135 transitions. [2022-02-14 22:59:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-14 22:59:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1135 transitions. [2022-02-14 22:59:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:04,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:04,040 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:04,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:04,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-14 22:59:04,257 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash 230455855, now seen corresponding path program 5 times [2022-02-14 22:59:04,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:04,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436836988] [2022-02-14 22:59:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:04,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:04,269 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:04,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463394658] [2022-02-14 22:59:04,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 22:59:04,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:04,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:04,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-14 22:59:04,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-14 22:59:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 22:59:04,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-02-14 22:59:04,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:59:04,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:04,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436836988] [2022-02-14 22:59:04,801 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:04,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463394658] [2022-02-14 22:59:04,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463394658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:59:04,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:59:04,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:59:04,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432033201] [2022-02-14 22:59:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:59:04,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:59:04,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:59:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:59:04,802 INFO L87 Difference]: Start difference. First operand 867 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:59:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:04,830 INFO L93 Difference]: Finished difference Result 839 states and 1096 transitions. [2022-02-14 22:59:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:59:04,831 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 187 [2022-02-14 22:59:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:04,833 INFO L225 Difference]: With dead ends: 839 [2022-02-14 22:59:04,833 INFO L226 Difference]: Without dead ends: 831 [2022-02-14 22:59:04,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:59:04,834 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:04,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:59:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-14 22:59:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 806. [2022-02-14 22:59:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 604 states have (on average 1.1688741721854305) internal successors, (706), 612 states have internal predecessors, (706), 177 states have call successors, (177), 26 states have call predecessors, (177), 24 states have return successors, (175), 167 states have call predecessors, (175), 175 states have call successors, (175) [2022-02-14 22:59:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1058 transitions. [2022-02-14 22:59:04,848 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1058 transitions. Word has length 187 [2022-02-14 22:59:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:04,849 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1058 transitions. [2022-02-14 22:59:04,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:59:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1058 transitions. [2022-02-14 22:59:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:04,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:04,852 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:04,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:05,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-14 22:59:05,057 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1521127760, now seen corresponding path program 6 times [2022-02-14 22:59:05,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:05,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494036902] [2022-02-14 22:59:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:05,067 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:05,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588883322] [2022-02-14 22:59:05,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 22:59:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:05,069 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:05,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-14 22:59:05,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 22:59:05,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:05,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 22:59:05,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-02-14 22:59:05,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:59:05,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:05,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494036902] [2022-02-14 22:59:05,433 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:05,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588883322] [2022-02-14 22:59:05,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588883322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:59:05,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:59:05,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:59:05,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366310567] [2022-02-14 22:59:05,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:59:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:59:05,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:59:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:59:05,434 INFO L87 Difference]: Start difference. First operand 806 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:59:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:05,451 INFO L93 Difference]: Finished difference Result 811 states and 1059 transitions. [2022-02-14 22:59:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 22:59:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 187 [2022-02-14 22:59:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:05,456 INFO L225 Difference]: With dead ends: 811 [2022-02-14 22:59:05,456 INFO L226 Difference]: Without dead ends: 782 [2022-02-14 22:59:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:59:05,456 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:05,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:59:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-14 22:59:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 755. [2022-02-14 22:59:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 566 states have (on average 1.1625441696113075) internal successors, (658), 573 states have internal predecessors, (658), 164 states have call successors, (164), 26 states have call predecessors, (164), 24 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-02-14 22:59:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 984 transitions. [2022-02-14 22:59:05,469 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 984 transitions. Word has length 187 [2022-02-14 22:59:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:05,469 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 984 transitions. [2022-02-14 22:59:05,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:59:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 984 transitions. [2022-02-14 22:59:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:05,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:05,472 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:05,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:05,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-14 22:59:05,676 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash 491630563, now seen corresponding path program 7 times [2022-02-14 22:59:05,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:05,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994785414] [2022-02-14 22:59:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:05,692 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:05,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53604666] [2022-02-14 22:59:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 22:59:05,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:05,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:05,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-14 22:59:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:59:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 22:59:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-02-14 22:59:06,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-02-14 22:59:06,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:06,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994785414] [2022-02-14 22:59:06,327 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:06,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53604666] [2022-02-14 22:59:06,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53604666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:06,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:06,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-02-14 22:59:06,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434132725] [2022-02-14 22:59:06,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:06,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:59:06,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:59:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:59:06,328 INFO L87 Difference]: Start difference. First operand 755 states and 984 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-02-14 22:59:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:06,712 INFO L93 Difference]: Finished difference Result 1523 states and 2012 transitions. [2022-02-14 22:59:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 22:59:06,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 187 [2022-02-14 22:59:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:06,716 INFO L225 Difference]: With dead ends: 1523 [2022-02-14 22:59:06,717 INFO L226 Difference]: Without dead ends: 1523 [2022-02-14 22:59:06,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-02-14 22:59:06,717 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 127 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1289 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:59:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-02-14 22:59:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1314. [2022-02-14 22:59:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 986 states have (on average 1.1795131845841784) internal successors, (1163), 1002 states have internal predecessors, (1163), 303 states have call successors, (303), 26 states have call predecessors, (303), 24 states have return successors, (301), 285 states have call predecessors, (301), 301 states have call successors, (301) [2022-02-14 22:59:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1767 transitions. [2022-02-14 22:59:06,741 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1767 transitions. Word has length 187 [2022-02-14 22:59:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 1767 transitions. [2022-02-14 22:59:06,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-02-14 22:59:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1767 transitions. [2022-02-14 22:59:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:06,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:06,745 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:06,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:06,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:06,959 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1463727385, now seen corresponding path program 8 times [2022-02-14 22:59:06,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:06,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765989948] [2022-02-14 22:59:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:06,966 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:06,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048402483] [2022-02-14 22:59:06,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:59:06,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:06,970 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-14 22:59:07,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:59:07,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:59:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-02-14 22:59:07,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-02-14 22:59:07,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:07,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765989948] [2022-02-14 22:59:07,652 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:07,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048402483] [2022-02-14 22:59:07,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048402483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:07,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:07,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 22:59:07,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115462685] [2022-02-14 22:59:07,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:07,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 22:59:07,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 22:59:07,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:59:07,653 INFO L87 Difference]: Start difference. First operand 1314 states and 1767 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-02-14 22:59:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:08,248 INFO L93 Difference]: Finished difference Result 2421 states and 3227 transitions. [2022-02-14 22:59:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-14 22:59:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 187 [2022-02-14 22:59:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:08,256 INFO L225 Difference]: With dead ends: 2421 [2022-02-14 22:59:08,256 INFO L226 Difference]: Without dead ends: 2417 [2022-02-14 22:59:08,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-02-14 22:59:08,256 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 203 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:08,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 977 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 22:59:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-02-14 22:59:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1968. [2022-02-14 22:59:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1475 states have (on average 1.1627118644067798) internal successors, (1715), 1503 states have internal predecessors, (1715), 468 states have call successors, (468), 26 states have call predecessors, (468), 24 states have return successors, (466), 438 states have call predecessors, (466), 466 states have call successors, (466) [2022-02-14 22:59:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2649 transitions. [2022-02-14 22:59:08,297 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2649 transitions. Word has length 187 [2022-02-14 22:59:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:08,297 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2649 transitions. [2022-02-14 22:59:08,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-02-14 22:59:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2649 transitions. [2022-02-14 22:59:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:08,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:08,302 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:08,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:08,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:08,515 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash 656453859, now seen corresponding path program 9 times [2022-02-14 22:59:08,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:08,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787707950] [2022-02-14 22:59:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:08,522 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:08,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307620048] [2022-02-14 22:59:08,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:59:08,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:08,526 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:08,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-14 22:59:09,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-14 22:59:09,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 22:59:09,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-02-14 22:59:09,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-02-14 22:59:09,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:09,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787707950] [2022-02-14 22:59:09,924 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:09,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307620048] [2022-02-14 22:59:09,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307620048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:09,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:09,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-02-14 22:59:09,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945566059] [2022-02-14 22:59:09,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:09,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 22:59:09,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:09,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 22:59:09,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-14 22:59:09,925 INFO L87 Difference]: Start difference. First operand 1968 states and 2649 transitions. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-02-14 22:59:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:11,156 INFO L93 Difference]: Finished difference Result 2993 states and 4017 transitions. [2022-02-14 22:59:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-14 22:59:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 187 [2022-02-14 22:59:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:11,165 INFO L225 Difference]: With dead ends: 2993 [2022-02-14 22:59:11,165 INFO L226 Difference]: Without dead ends: 2993 [2022-02-14 22:59:11,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2022-02-14 22:59:11,166 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 299 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:11,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2742 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 22:59:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-02-14 22:59:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2462. [2022-02-14 22:59:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1845 states have (on average 1.1718157181571816) internal successors, (2162), 1887 states have internal predecessors, (2162), 592 states have call successors, (592), 26 states have call predecessors, (592), 24 states have return successors, (590), 548 states have call predecessors, (590), 590 states have call successors, (590) [2022-02-14 22:59:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3344 transitions. [2022-02-14 22:59:11,215 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3344 transitions. Word has length 187 [2022-02-14 22:59:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:11,216 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 3344 transitions. [2022-02-14 22:59:11,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-02-14 22:59:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3344 transitions. [2022-02-14 22:59:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 22:59:11,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:11,222 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:11,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:11,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:11,426 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:11,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1870351901, now seen corresponding path program 10 times [2022-02-14 22:59:11,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:11,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078563395] [2022-02-14 22:59:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:11,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:11,437 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:11,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421496853] [2022-02-14 22:59:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 22:59:11,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:11,439 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:11,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-14 22:59:11,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 22:59:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-14 22:59:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:59:12,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-02-14 22:59:12,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:12,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078563395] [2022-02-14 22:59:12,744 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:12,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421496853] [2022-02-14 22:59:12,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421496853] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:12,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:12,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-02-14 22:59:12,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386884431] [2022-02-14 22:59:12,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:12,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-14 22:59:12,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-14 22:59:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-02-14 22:59:12,746 INFO L87 Difference]: Start difference. First operand 2462 states and 3344 transitions. Second operand has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-02-14 22:59:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:14,303 INFO L93 Difference]: Finished difference Result 9897 states and 14111 transitions. [2022-02-14 22:59:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-14 22:59:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) Word has length 187 [2022-02-14 22:59:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:14,333 INFO L225 Difference]: With dead ends: 9897 [2022-02-14 22:59:14,333 INFO L226 Difference]: Without dead ends: 9897 [2022-02-14 22:59:14,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-02-14 22:59:14,335 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1468 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:14,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 881 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 22:59:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-02-14 22:59:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 9645. [2022-02-14 22:59:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 7245 states have (on average 1.2641821946169771) internal successors, (9159), 7308 states have internal predecessors, (9159), 2355 states have call successors, (2355), 46 states have call predecessors, (2355), 44 states have return successors, (2353), 2290 states have call predecessors, (2353), 2353 states have call successors, (2353) [2022-02-14 22:59:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 13867 transitions. [2022-02-14 22:59:14,543 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 13867 transitions. Word has length 187 [2022-02-14 22:59:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:14,544 INFO L470 AbstractCegarLoop]: Abstraction has 9645 states and 13867 transitions. [2022-02-14 22:59:14,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-02-14 22:59:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 13867 transitions. [2022-02-14 22:59:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-02-14 22:59:14,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:14,551 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:14,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:14,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:14,768 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -517824918, now seen corresponding path program 2 times [2022-02-14 22:59:14,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:14,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30385019] [2022-02-14 22:59:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:14,779 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:14,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114048968] [2022-02-14 22:59:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:59:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:14,780 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:14,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-14 22:59:14,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:59:14,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-14 22:59:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:59:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-02-14 22:59:16,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:16,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30385019] [2022-02-14 22:59:16,024 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:16,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114048968] [2022-02-14 22:59:16,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114048968] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:16,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:16,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-02-14 22:59:16,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467254827] [2022-02-14 22:59:16,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:16,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-14 22:59:16,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-14 22:59:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-02-14 22:59:16,026 INFO L87 Difference]: Start difference. First operand 9645 states and 13867 transitions. Second operand has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-02-14 22:59:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:17,656 INFO L93 Difference]: Finished difference Result 7747 states and 10618 transitions. [2022-02-14 22:59:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-14 22:59:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) Word has length 193 [2022-02-14 22:59:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:17,673 INFO L225 Difference]: With dead ends: 7747 [2022-02-14 22:59:17,673 INFO L226 Difference]: Without dead ends: 7697 [2022-02-14 22:59:17,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-02-14 22:59:17,675 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1640 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:17,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 860 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 22:59:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-02-14 22:59:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7470. [2022-02-14 22:59:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 5600 states have (on average 1.1821428571428572) internal successors, (6620), 5644 states have internal predecessors, (6620), 1823 states have call successors, (1823), 48 states have call predecessors, (1823), 46 states have return successors, (1821), 1777 states have call predecessors, (1821), 1821 states have call successors, (1821) [2022-02-14 22:59:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10264 transitions. [2022-02-14 22:59:17,809 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10264 transitions. Word has length 193 [2022-02-14 22:59:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:17,810 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 10264 transitions. [2022-02-14 22:59:17,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-02-14 22:59:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10264 transitions. [2022-02-14 22:59:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-14 22:59:17,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:17,817 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:17,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-14 22:59:18,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:18,032 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1869519853, now seen corresponding path program 2 times [2022-02-14 22:59:18,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:18,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287469724] [2022-02-14 22:59:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:18,039 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:18,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405620555] [2022-02-14 22:59:18,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:59:18,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:18,041 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:18,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-14 22:59:18,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:59:18,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-14 22:59:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:59:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:59:18,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:59:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-02-14 22:59:19,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:59:19,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287469724] [2022-02-14 22:59:19,310 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:59:19,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405620555] [2022-02-14 22:59:19,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405620555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:59:19,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:59:19,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-14 22:59:19,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200032214] [2022-02-14 22:59:19,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:59:19,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 22:59:19,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:59:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 22:59:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 22:59:19,312 INFO L87 Difference]: Start difference. First operand 7470 states and 10264 transitions. Second operand has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-14 22:59:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:59:21,020 INFO L93 Difference]: Finished difference Result 8071 states and 10893 transitions. [2022-02-14 22:59:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-14 22:59:21,020 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 199 [2022-02-14 22:59:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:59:21,038 INFO L225 Difference]: With dead ends: 8071 [2022-02-14 22:59:21,038 INFO L226 Difference]: Without dead ends: 7927 [2022-02-14 22:59:21,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-02-14 22:59:21,040 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1813 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 1243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1243 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 22:59:21,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 807 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1243 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 22:59:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2022-02-14 22:59:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7220. [2022-02-14 22:59:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7220 states, 5413 states have (on average 1.1211897284315537) internal successors, (6069), 5457 states have internal predecessors, (6069), 1758 states have call successors, (1758), 50 states have call predecessors, (1758), 48 states have return successors, (1756), 1712 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-02-14 22:59:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7220 states to 7220 states and 9583 transitions. [2022-02-14 22:59:21,140 INFO L78 Accepts]: Start accepts. Automaton has 7220 states and 9583 transitions. Word has length 199 [2022-02-14 22:59:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:59:21,141 INFO L470 AbstractCegarLoop]: Abstraction has 7220 states and 9583 transitions. [2022-02-14 22:59:21,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-14 22:59:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7220 states and 9583 transitions. [2022-02-14 22:59:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-02-14 22:59:21,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:59:21,161 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:59:21,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-14 22:59:21,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:21,377 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:59:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:59:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1162964928, now seen corresponding path program 11 times [2022-02-14 22:59:21,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:59:21,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762377673] [2022-02-14 22:59:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:59:21,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:59:21,393 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:59:21,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881934600] [2022-02-14 22:59:21,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 22:59:21,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:59:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:59:21,394 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:59:21,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-14 22:59:21,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-02-14 22:59:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:59:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 22:59:21,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:00:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 968 refuted. 24 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-02-14 23:00:09,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:06:54,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:06:54,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762377673] [2022-02-14 23:06:54,997 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:06:54,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881934600] [2022-02-14 23:06:54,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881934600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:06:54,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:06:54,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-02-14 23:06:54,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390773392] [2022-02-14 23:06:54,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:06:54,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 23:06:54,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:06:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 23:06:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=901, Unknown=24, NotChecked=0, Total=1190 [2022-02-14 23:06:54,998 INFO L87 Difference]: Start difference. First operand 7220 states and 9583 transitions. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-02-14 23:07:35,890 WARN L228 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 58 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:07:44,544 WARN L228 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:07:57,580 WARN L228 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 77 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:08:11,844 WARN L228 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 63 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:08:30,448 WARN L228 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 61 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:09:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:12,536 INFO L93 Difference]: Finished difference Result 15052 states and 20176 transitions. [2022-02-14 23:09:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-14 23:09:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) Word has length 379 [2022-02-14 23:09:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:12,562 INFO L225 Difference]: With dead ends: 15052 [2022-02-14 23:09:12,562 INFO L226 Difference]: Without dead ends: 15052 [2022-02-14 23:09:12,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 634 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 187.6s TimeCoverageRelationStatistics Valid=854, Invalid=2883, Unknown=45, NotChecked=0, Total=3782 [2022-02-14 23:09:12,563 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 261 mSDsluCounter, 3377 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 3666 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1225 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:12,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 3666 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 892 Invalid, 0 Unknown, 1225 Unchecked, 1.0s Time] [2022-02-14 23:09:12,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2022-02-14 23:09:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 14181. [2022-02-14 23:09:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 10637 states have (on average 1.1329322177305632) internal successors, (12051), 10738 states have internal predecessors, (12051), 3495 states have call successors, (3495), 50 states have call predecessors, (3495), 48 states have return successors, (3493), 3392 states have call predecessors, (3493), 3493 states have call successors, (3493) [2022-02-14 23:09:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 19039 transitions. [2022-02-14 23:09:12,847 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 19039 transitions. Word has length 379 [2022-02-14 23:09:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:12,848 INFO L470 AbstractCegarLoop]: Abstraction has 14181 states and 19039 transitions. [2022-02-14 23:09:12,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-02-14 23:09:12,848 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 19039 transitions. [2022-02-14 23:09:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-02-14 23:09:12,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:12,883 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:12,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-14 23:09:13,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-14 23:09:13,098 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:13,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1363840832, now seen corresponding path program 12 times [2022-02-14 23:09:13,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:13,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010414214] [2022-02-14 23:09:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:13,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:13,108 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:13,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107439861] [2022-02-14 23:09:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 23:09:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:13,111 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:09:13,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-14 23:09:26,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-14 23:09:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:09:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-14 23:09:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates...