/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 09:27:35,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 09:27:35,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 09:27:35,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 09:27:35,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 09:27:35,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 09:27:35,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 09:27:35,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 09:27:35,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 09:27:35,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 09:27:35,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 09:27:35,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 09:27:35,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 09:27:35,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 09:27:35,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 09:27:35,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 09:27:35,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 09:27:35,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 09:27:35,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 09:27:35,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 09:27:35,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 09:27:35,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 09:27:35,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 09:27:35,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 09:27:35,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 09:27:35,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 09:27:35,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 09:27:35,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 09:27:35,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 09:27:35,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 09:27:35,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 09:27:35,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 09:27:35,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 09:27:35,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 09:27:35,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 09:27:35,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 09:27:35,546 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 09:27:35,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 09:27:35,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 09:27:35,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 09:27:35,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 09:27:35,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 09:27:35,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 09:27:35,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:27:35,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 09:27:35,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 09:27:35,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 09:27:35,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 09:27:35,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 09:27:35,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 09:27:35,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 09:27:35,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 09:27:35,550 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 09:27:35,550 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 09:27:35,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 09:27:35,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 09:27:35,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 09:27:35,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 09:27:35,713 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 09:27:35,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2022-04-05 09:27:35,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f14c4047/f0c93ff82ddc4b0a88c31c68482d3e67/FLAG0250e0a36 [2022-04-05 09:27:36,044 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 09:27:36,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2022-04-05 09:27:36,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f14c4047/f0c93ff82ddc4b0a88c31c68482d3e67/FLAG0250e0a36 [2022-04-05 09:27:36,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f14c4047/f0c93ff82ddc4b0a88c31c68482d3e67 [2022-04-05 09:27:36,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 09:27:36,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 09:27:36,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 09:27:36,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 09:27:36,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 09:27:36,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8e3e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36, skipping insertion in model container [2022-04-05 09:27:36,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 09:27:36,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 09:27:36,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2022-04-05 09:27:36,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:27:36,634 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 09:27:36,641 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2022-04-05 09:27:36,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:27:36,653 INFO L208 MainTranslator]: Completed translation [2022-04-05 09:27:36,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36 WrapperNode [2022-04-05 09:27:36,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 09:27:36,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 09:27:36,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 09:27:36,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 09:27:36,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 09:27:36,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 09:27:36,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 09:27:36,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 09:27:36,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:27:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:36,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 09:27:36,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 09:27:36,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 09:27:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 09:27:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 09:27:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 09:27:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 09:27:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 09:27:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 09:27:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 09:27:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 09:27:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 09:27:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-05 09:27:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 09:27:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 09:27:36,777 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 09:27:36,778 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 09:27:36,854 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 09:27:36,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 09:27:36,858 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 09:27:36,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:27:36 BoogieIcfgContainer [2022-04-05 09:27:36,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 09:27:36,859 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 09:27:36,859 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 09:27:36,860 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 09:27:36,862 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:27:36" (1/1) ... [2022-04-05 09:27:36,867 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 09:27:36,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:27:36 BasicIcfg [2022-04-05 09:27:36,890 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 09:27:36,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 09:27:36,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 09:27:36,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 09:27:36,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 09:27:36" (1/4) ... [2022-04-05 09:27:36,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10715eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:27:36, skipping insertion in model container [2022-04-05 09:27:36,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:27:36" (2/4) ... [2022-04-05 09:27:36,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10715eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:27:36, skipping insertion in model container [2022-04-05 09:27:36,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:27:36" (3/4) ... [2022-04-05 09:27:36,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10715eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:27:36, skipping insertion in model container [2022-04-05 09:27:36,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:27:36" (4/4) ... [2022-04-05 09:27:36,904 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.cqvasr [2022-04-05 09:27:36,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 09:27:36,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 09:27:36,954 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 09:27:36,958 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 09:27:36,958 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 09:27:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:27:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 09:27:36,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:36,977 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:36,978 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-04-05 09:27:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338290369] [2022-04-05 09:27:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:37,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:27:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 09:27:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 09:27:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:27:37,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:37,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338290369] [2022-04-05 09:27:37,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338290369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:27:37,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:27:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 09:27:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600095227] [2022-04-05 09:27:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:27:37,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 09:27:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 09:27:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:27:37,159 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 09:27:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:37,206 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-04-05 09:27:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 09:27:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 09:27:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:37,213 INFO L225 Difference]: With dead ends: 51 [2022-04-05 09:27:37,213 INFO L226 Difference]: Without dead ends: 24 [2022-04-05 09:27:37,215 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:27:37,217 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:37,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:27:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-05 09:27:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-05 09:27:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 09:27:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-05 09:27:37,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-04-05 09:27:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:37,241 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-05 09:27:37,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 09:27:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-05 09:27:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 09:27:37,242 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:37,242 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:37,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 09:27:37,242 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:37,243 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-04-05 09:27:37,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:37,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725973762] [2022-04-05 09:27:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:37,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:37,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:37,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263558451] [2022-04-05 09:27:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:37,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:37,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:37,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:37,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 09:27:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:37,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 09:27:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:27:37,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:27:37,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:37,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725973762] [2022-04-05 09:27:37,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:37,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263558451] [2022-04-05 09:27:37,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263558451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:27:37,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:27:37,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 09:27:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136727769] [2022-04-05 09:27:37,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:27:37,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:27:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:27:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:27:37,425 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 09:27:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:37,570 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-04-05 09:27:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:27:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-05 09:27:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:37,571 INFO L225 Difference]: With dead ends: 35 [2022-04-05 09:27:37,571 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 09:27:37,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 09:27:37,573 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:37,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:27:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 09:27:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 09:27:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:27:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-05 09:27:37,579 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-04-05 09:27:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:37,579 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-05 09:27:37,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 09:27:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-05 09:27:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 09:27:37,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:37,580 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:37,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 09:27:37,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:37,781 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-04-05 09:27:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:37,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463662380] [2022-04-05 09:27:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:37,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755596937] [2022-04-05 09:27:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:37,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:37,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:37,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:37,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 09:27:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:37,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 09:27:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:27:38,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:27:38,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:38,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463662380] [2022-04-05 09:27:38,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:38,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755596937] [2022-04-05 09:27:38,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755596937] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:38,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:38,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 09:27:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375162273] [2022-04-05 09:27:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:27:38,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:27:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:27:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 09:27:38,508 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 09:27:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:38,540 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-05 09:27:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:27:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-05 09:27:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:38,542 INFO L225 Difference]: With dead ends: 37 [2022-04-05 09:27:38,542 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 09:27:38,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 09:27:38,543 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:38,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:27:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 09:27:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-05 09:27:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:27:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-05 09:27:38,551 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-04-05 09:27:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:38,551 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-05 09:27:38,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 09:27:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-05 09:27:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 09:27:38,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:38,553 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:38,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:38,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 09:27:38,757 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-04-05 09:27:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:38,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619328000] [2022-04-05 09:27:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:38,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:38,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790765378] [2022-04-05 09:27:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:38,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:38,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:38,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 09:27:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:27:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 09:27:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 09:27:38,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:39,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:39,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619328000] [2022-04-05 09:27:39,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:39,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790765378] [2022-04-05 09:27:39,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790765378] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:39,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:39,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 09:27:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910123458] [2022-04-05 09:27:39,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:39,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 09:27:39,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 09:27:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 09:27:39,144 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 09:27:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:39,217 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-05 09:27:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 09:27:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-04-05 09:27:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:39,220 INFO L225 Difference]: With dead ends: 42 [2022-04-05 09:27:39,220 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 09:27:39,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:27:39,223 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:39,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:27:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 09:27:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-05 09:27:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:27:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-05 09:27:39,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-04-05 09:27:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:39,230 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-05 09:27:39,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 09:27:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-05 09:27:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 09:27:39,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:39,231 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:39,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:39,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:39,443 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-04-05 09:27:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786587912] [2022-04-05 09:27:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:39,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:39,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661814417] [2022-04-05 09:27:39,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:27:39,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:39,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:39,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:39,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 09:27:39,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:27:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:27:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 09:27:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 09:27:39,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786587912] [2022-04-05 09:27:39,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661814417] [2022-04-05 09:27:39,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661814417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:39,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:39,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 09:27:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899781015] [2022-04-05 09:27:39,789 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:39,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 09:27:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 09:27:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 09:27:39,790 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:27:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:39,871 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-04-05 09:27:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 09:27:39,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-04-05 09:27:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:39,872 INFO L225 Difference]: With dead ends: 45 [2022-04-05 09:27:39,872 INFO L226 Difference]: Without dead ends: 39 [2022-04-05 09:27:39,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-05 09:27:39,873 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:39,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:27:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-05 09:27:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-05 09:27:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 09:27:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-05 09:27:39,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-04-05 09:27:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:39,878 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-05 09:27:39,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:27:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-05 09:27:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 09:27:39,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:39,880 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:39,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:40,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:40,084 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-04-05 09:27:40,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:40,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929582499] [2022-04-05 09:27:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:40,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:40,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553115011] [2022-04-05 09:27:40,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:27:40,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:40,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:40,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:40,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 09:27:40,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 09:27:40,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:27:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 09:27:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 09:27:40,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929582499] [2022-04-05 09:27:40,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553115011] [2022-04-05 09:27:40,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553115011] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:40,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:40,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 09:27:40,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133761657] [2022-04-05 09:27:40,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:40,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 09:27:40,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 09:27:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:27:40,559 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-05 09:27:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:40,650 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-05 09:27:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 09:27:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-04-05 09:27:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:40,651 INFO L225 Difference]: With dead ends: 48 [2022-04-05 09:27:40,651 INFO L226 Difference]: Without dead ends: 42 [2022-04-05 09:27:40,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:27:40,652 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:40,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:27:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-05 09:27:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-05 09:27:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 09:27:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-05 09:27:40,657 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-04-05 09:27:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:40,657 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-05 09:27:40,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-05 09:27:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-05 09:27:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 09:27:40,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:40,658 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:40,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:40,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:40,863 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-04-05 09:27:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964171766] [2022-04-05 09:27:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:40,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:40,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:40,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601544927] [2022-04-05 09:27:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:27:40,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:40,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:40,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:40,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 09:27:40,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:27:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:27:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 09:27:40,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 09:27:41,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:41,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:41,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964171766] [2022-04-05 09:27:41,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601544927] [2022-04-05 09:27:41,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601544927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:41,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:41,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-05 09:27:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709668026] [2022-04-05 09:27:41,162 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:41,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 09:27:41,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 09:27:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-05 09:27:41,164 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-05 09:27:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:41,281 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-04-05 09:27:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 09:27:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-04-05 09:27:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:41,282 INFO L225 Difference]: With dead ends: 51 [2022-04-05 09:27:41,282 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 09:27:41,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-05 09:27:41,282 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:41,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 234 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:27:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 09:27:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-05 09:27:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 09:27:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-05 09:27:41,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-04-05 09:27:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:41,288 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-05 09:27:41,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-05 09:27:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-05 09:27:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 09:27:41,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:41,288 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:41,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:41,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:41,504 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-04-05 09:27:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782723751] [2022-04-05 09:27:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:41,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:41,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:41,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29665004] [2022-04-05 09:27:41,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:27:41,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:41,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:41,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 09:27:42,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-05 09:27:42,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:27:42,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 09:27:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 09:27:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782723751] [2022-04-05 09:27:42,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29665004] [2022-04-05 09:27:42,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29665004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:42,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:42,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-05 09:27:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101179109] [2022-04-05 09:27:42,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:42,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 09:27:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 09:27:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:27:42,354 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-05 09:27:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:42,485 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-05 09:27:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 09:27:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-04-05 09:27:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:42,486 INFO L225 Difference]: With dead ends: 54 [2022-04-05 09:27:42,486 INFO L226 Difference]: Without dead ends: 48 [2022-04-05 09:27:42,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-05 09:27:42,487 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:42,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 271 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:27:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-05 09:27:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-05 09:27:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 09:27:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-04-05 09:27:42,492 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-04-05 09:27:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:42,492 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-04-05 09:27:42,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-05 09:27:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-04-05 09:27:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 09:27:42,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:42,493 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:42,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:42,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:42,694 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-04-05 09:27:42,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:42,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815798436] [2022-04-05 09:27:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:42,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:42,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:42,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925215024] [2022-04-05 09:27:42,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 09:27:42,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:42,704 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:42,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 09:27:43,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 09:27:43,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:27:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 09:27:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 09:27:43,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:43,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815798436] [2022-04-05 09:27:43,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925215024] [2022-04-05 09:27:43,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925215024] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:43,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:43,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-05 09:27:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275317466] [2022-04-05 09:27:43,565 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:43,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 09:27:43,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 09:27:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-05 09:27:43,566 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 09:27:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:43,724 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-05 09:27:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 09:27:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-04-05 09:27:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:43,725 INFO L225 Difference]: With dead ends: 57 [2022-04-05 09:27:43,725 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 09:27:43,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-05 09:27:43,726 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:43,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 310 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:27:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 09:27:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-05 09:27:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 09:27:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-04-05 09:27:43,731 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-04-05 09:27:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:43,732 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-04-05 09:27:43,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 09:27:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-04-05 09:27:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-05 09:27:43,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:43,732 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:43,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:43,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 09:27:43,938 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2022-04-05 09:27:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:43,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102615531] [2022-04-05 09:27:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:43,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013892147] [2022-04-05 09:27:43,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 09:27:43,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:43,957 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:43,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 09:28:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:28:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 09:28:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:28:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-05 09:28:31,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:28:31,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:28:31,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102615531] [2022-04-05 09:28:31,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:28:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013892147] [2022-04-05 09:28:31,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013892147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:28:31,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:28:31,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-05 09:28:31,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78835789] [2022-04-05 09:28:31,262 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:28:31,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 09:28:31,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:28:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 09:28:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-05 09:28:31,263 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-04-05 09:28:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:28:31,439 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-05 09:28:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 09:28:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-04-05 09:28:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:28:31,440 INFO L225 Difference]: With dead ends: 60 [2022-04-05 09:28:31,440 INFO L226 Difference]: Without dead ends: 54 [2022-04-05 09:28:31,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-05 09:28:31,441 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:28:31,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 351 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:28:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-05 09:28:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-05 09:28:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 09:28:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-04-05 09:28:31,447 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-04-05 09:28:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:28:31,447 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-04-05 09:28:31,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-04-05 09:28:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-04-05 09:28:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-05 09:28:31,448 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:28:31,448 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:28:31,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 09:28:31,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 09:28:31,660 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:28:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:28:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2022-04-05 09:28:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:28:31,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991508325] [2022-04-05 09:28:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:28:31,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:28:31,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:28:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713715178] [2022-04-05 09:28:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:28:31,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:28:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:28:31,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:28:31,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 09:28:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:28:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:28:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 09:28:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:28:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 63 proven. 113 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-05 09:28:32,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:28:55,921 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 5) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0)))))) is different from false [2022-04-05 09:28:55,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:28:55,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991508325] [2022-04-05 09:28:55,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:28:55,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713715178] [2022-04-05 09:28:55,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713715178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:28:55,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:28:55,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-05 09:28:55,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327612023] [2022-04-05 09:28:55,924 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:28:55,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 09:28:55,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:28:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 09:28:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=4, NotChecked=42, Total=552 [2022-04-05 09:28:55,925 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-05 09:28:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:28:56,269 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-04-05 09:28:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 09:28:56,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-04-05 09:28:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:28:56,270 INFO L225 Difference]: With dead ends: 63 [2022-04-05 09:28:56,270 INFO L226 Difference]: Without dead ends: 57 [2022-04-05 09:28:56,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=4, NotChecked=48, Total=702 [2022-04-05 09:28:56,271 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 09:28:56,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 383 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 09:28:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-05 09:28:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-05 09:28:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 09:28:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-04-05 09:28:56,277 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-04-05 09:28:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:28:56,278 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-04-05 09:28:56,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-05 09:28:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-04-05 09:28:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-05 09:28:56,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:28:56,279 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:28:56,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-05 09:28:56,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 09:28:56,484 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:28:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:28:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2022-04-05 09:28:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:28:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079154081] [2022-04-05 09:28:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:28:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:28:56,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:28:56,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762133281] [2022-04-05 09:28:56,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:28:56,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:28:56,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:28:56,504 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:28:56,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process