/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/divbin2_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:59:03,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:59:03,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:59:03,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:59:03,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:59:03,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:59:03,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:59:03,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:59:03,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:59:03,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:59:03,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:59:03,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:59:03,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:59:03,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:59:03,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:59:03,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:59:03,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:59:03,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:59:03,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:59:03,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:59:03,268 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:59:03,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:59:03,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:59:03,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:59:03,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:59:03,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 20:59:03,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 20:59:03,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 20:59:03,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 20:59:03,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 20:59:03,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 20:59:03,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:59:03,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:59:03,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:59:03,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:59:03,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:59:03,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:59:03,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:59:03,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:59:03,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:59:03,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:59:03,317 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:59:03,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:59:03,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:59:03,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:59:03,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:59:03,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:59:03,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:59:03,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:59:03,318 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:59:03,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:59:03,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:59:03,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:59:03,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:59:03,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:59:03,320 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:59:03,320 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:59:03,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:59:03,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:59:03,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:59:03,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:59:03,488 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:59:03,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2022-03-17 20:59:03,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bc745b15/98f4545f08a74c6c87d9bb19078bdf5c/FLAGd890d36d9 [2022-03-17 20:59:03,847 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:59:03,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2022-03-17 20:59:03,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bc745b15/98f4545f08a74c6c87d9bb19078bdf5c/FLAGd890d36d9 [2022-03-17 20:59:04,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bc745b15/98f4545f08a74c6c87d9bb19078bdf5c [2022-03-17 20:59:04,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:59:04,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:59:04,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:59:04,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:59:04,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:59:04,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4109d5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04, skipping insertion in model container [2022-03-17 20:59:04,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:59:04,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:59:04,424 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/divbin2_unwindbound20.i[951,964] [2022-03-17 20:59:04,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:59:04,453 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:59:04,470 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/divbin2_unwindbound20.i[951,964] [2022-03-17 20:59:04,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:59:04,487 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:59:04,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04 WrapperNode [2022-03-17 20:59:04,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:59:04,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:59:04,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:59:04,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:59:04,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:59:04,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:59:04,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:59:04,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:59:04,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:59:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:04,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 20:59:04,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 20:59:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:59:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:59:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:59:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:59:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:59:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:59:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:59:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:59:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:59:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:59:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:59:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:59:04,630 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:59:04,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:59:04,718 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:59:04,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:59:04,722 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 20:59:04,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:59:04 BoogieIcfgContainer [2022-03-17 20:59:04,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:59:04,724 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:59:04,724 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:59:04,725 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:59:04,727 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:59:04" (1/1) ... [2022-03-17 20:59:04,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:59:04 BasicIcfg [2022-03-17 20:59:04,739 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:59:04,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:59:04,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:59:04,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:59:04,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:59:04" (1/4) ... [2022-03-17 20:59:04,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee220c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:59:04, skipping insertion in model container [2022-03-17 20:59:04,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:59:04" (2/4) ... [2022-03-17 20:59:04,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee220c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:59:04, skipping insertion in model container [2022-03-17 20:59:04,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:59:04" (3/4) ... [2022-03-17 20:59:04,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee220c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:59:04, skipping insertion in model container [2022-03-17 20:59:04,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:59:04" (4/4) ... [2022-03-17 20:59:04,745 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.iqvasr [2022-03-17 20:59:04,748 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:59:04,749 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:59:04,788 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:59:04,798 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 20:59:04,798 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:59:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 20:59:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 20:59:04,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:04,833 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:04,834 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2022-03-17 20:59:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:04,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858434018] [2022-03-17 20:59:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:04,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:59:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:04,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858434018] [2022-03-17 20:59:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858434018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:59:04,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:59:04,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:59:04,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303994345] [2022-03-17 20:59:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:59:04,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:59:04,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:59:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:59:04,988 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:05,054 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-17 20:59:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:59:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 20:59:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:05,062 INFO L225 Difference]: With dead ends: 44 [2022-03-17 20:59:05,062 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 20:59:05,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:59:05,067 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:05,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:59:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 20:59:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 20:59:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:59:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-17 20:59:05,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-03-17 20:59:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:05,093 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-17 20:59:05,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-17 20:59:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 20:59:05,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:05,093 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:05,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:59:05,094 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2022-03-17 20:59:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:05,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097673694] [2022-03-17 20:59:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:05,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:59:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:05,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:05,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097673694] [2022-03-17 20:59:05,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097673694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:59:05,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:59:05,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:59:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625851989] [2022-03-17 20:59:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:59:05,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:59:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:59:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:59:05,156 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:05,200 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-17 20:59:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:59:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 20:59:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:05,201 INFO L225 Difference]: With dead ends: 35 [2022-03-17 20:59:05,201 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 20:59:05,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:59:05,202 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:05,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:59:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 20:59:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 20:59:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:59:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-17 20:59:05,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-03-17 20:59:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:05,213 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-17 20:59:05,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-17 20:59:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 20:59:05,214 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:05,214 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:05,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:59:05,214 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2022-03-17 20:59:05,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:05,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437871795] [2022-03-17 20:59:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:05,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:05,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697767882] [2022-03-17 20:59:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:05,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:05,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:05,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:59:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:59:05,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:05,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:59:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:05,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437871795] [2022-03-17 20:59:05,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:05,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697767882] [2022-03-17 20:59:05,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697767882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:59:05,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:59:05,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:59:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575893194] [2022-03-17 20:59:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:59:05,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:59:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:59:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:59:05,406 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:05,422 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-17 20:59:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:59:05,423 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), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-17 20:59:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:05,423 INFO L225 Difference]: With dead ends: 34 [2022-03-17 20:59:05,423 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 20:59:05,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:59:05,424 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:05,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:59:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 20:59:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-17 20:59:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:59:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-03-17 20:59:05,429 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-03-17 20:59:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:05,429 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-03-17 20:59:05,429 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), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-03-17 20:59:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 20:59:05,429 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:05,430 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:05,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 20:59:05,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:05,648 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2022-03-17 20:59:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:05,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875411064] [2022-03-17 20:59:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:05,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:05,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695927600] [2022-03-17 20:59:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:05,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:05,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:05,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:59:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 20:59:05,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:05,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:59:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:05,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875411064] [2022-03-17 20:59:05,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695927600] [2022-03-17 20:59:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695927600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:59:05,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:59:05,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:59:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781119688] [2022-03-17 20:59:05,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:59:05,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:59:05,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:59:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:59:05,907 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:05,954 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-03-17 20:59:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:59:05,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-17 20:59:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:05,957 INFO L225 Difference]: With dead ends: 35 [2022-03-17 20:59:05,957 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 20:59:05,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-17 20:59:05,960 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:05,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:59:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 20:59:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 20:59:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:59:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-17 20:59:05,970 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-03-17 20:59:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:05,970 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-17 20:59:05,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-17 20:59:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:59:05,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:05,972 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:05,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:59:06,189 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,SelfDestructingSolverStorable3 [2022-03-17 20:59:06,190 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2022-03-17 20:59:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:06,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652491004] [2022-03-17 20:59:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:06,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:06,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633121374] [2022-03-17 20:59:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:06,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:06,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:59:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:06,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:59:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:06,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:59:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:06,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:06,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652491004] [2022-03-17 20:59:06,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:06,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633121374] [2022-03-17 20:59:06,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633121374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:59:06,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:59:06,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 20:59:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73072133] [2022-03-17 20:59:06,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:59:06,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:59:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:59:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:59:06,356 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:59:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:06,410 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-17 20:59:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:59:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 20:59:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:06,419 INFO L225 Difference]: With dead ends: 66 [2022-03-17 20:59:06,419 INFO L226 Difference]: Without dead ends: 54 [2022-03-17 20:59:06,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:59:06,421 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:06,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:59:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-17 20:59:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-03-17 20:59:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:59:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-03-17 20:59:06,431 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2022-03-17 20:59:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:06,432 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-03-17 20:59:06,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:59:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-03-17 20:59:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:59:06,433 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:06,433 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:06,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:59:06,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:06,648 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2022-03-17 20:59:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:06,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851878546] [2022-03-17 20:59:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:06,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:06,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:06,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948502939] [2022-03-17 20:59:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:06,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:06,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:59:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:59:06,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:06,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:59:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:06,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851878546] [2022-03-17 20:59:06,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948502939] [2022-03-17 20:59:06,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948502939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:59:06,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:59:06,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 20:59:06,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474913443] [2022-03-17 20:59:06,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:59:06,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:59:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:59:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:59:06,889 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:59:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:06,977 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-03-17 20:59:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 20:59:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 20:59:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:06,978 INFO L225 Difference]: With dead ends: 91 [2022-03-17 20:59:06,978 INFO L226 Difference]: Without dead ends: 84 [2022-03-17 20:59:06,978 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:59:06,979 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:06,979 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:59:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-17 20:59:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-03-17 20:59:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 20:59:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-03-17 20:59:06,985 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2022-03-17 20:59:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:06,985 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-03-17 20:59:06,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:59:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-03-17 20:59:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:59:06,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:06,986 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:07,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 20:59:07,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:07,214 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2022-03-17 20:59:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123061130] [2022-03-17 20:59:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:07,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:07,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995040895] [2022-03-17 20:59:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:07,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:07,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:59:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 20:59:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:07,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:59:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123061130] [2022-03-17 20:59:07,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995040895] [2022-03-17 20:59:07,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995040895] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 20:59:07,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:59:07,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-17 20:59:07,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624487060] [2022-03-17 20:59:07,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:59:07,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:59:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:59:07,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:59:07,553 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:07,572 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-03-17 20:59:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:59:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-17 20:59:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:07,576 INFO L225 Difference]: With dead ends: 110 [2022-03-17 20:59:07,576 INFO L226 Difference]: Without dead ends: 108 [2022-03-17 20:59:07,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:59:07,577 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:07,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-17 20:59:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-17 20:59:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-17 20:59:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 89 states have internal predecessors, (104), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:59:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-03-17 20:59:07,586 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 18 [2022-03-17 20:59:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:07,587 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-03-17 20:59:07,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:59:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-03-17 20:59:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:59:07,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:07,587 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:07,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:59:07,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:07,805 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:07,805 INFO L85 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2022-03-17 20:59:07,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:07,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2688256] [2022-03-17 20:59:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:07,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:07,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:07,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963370814] [2022-03-17 20:59:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:07,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:07,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:07,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:07,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:59:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:07,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 20:59:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:07,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:59:07,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2688256] [2022-03-17 20:59:07,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963370814] [2022-03-17 20:59:07,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963370814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:59:07,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:59:07,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:59:07,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488390260] [2022-03-17 20:59:07,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:59:07,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:59:07,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:59:07,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:59:07,898 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:59:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:07,909 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2022-03-17 20:59:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:59:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-17 20:59:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:07,910 INFO L225 Difference]: With dead ends: 148 [2022-03-17 20:59:07,910 INFO L226 Difference]: Without dead ends: 93 [2022-03-17 20:59:07,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:59:07,911 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:07,911 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:59:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-17 20:59:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-17 20:59:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 77 states have internal predecessors, (91), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:59:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-03-17 20:59:07,919 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 24 [2022-03-17 20:59:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:07,919 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-03-17 20:59:07,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:59:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-03-17 20:59:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:59:07,920 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:07,920 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:07,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:59:08,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:08,138 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1651364104, now seen corresponding path program 1 times [2022-03-17 20:59:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:08,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387713658] [2022-03-17 20:59:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:08,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:08,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098351922] [2022-03-17 20:59:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:08,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:08,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:08,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:59:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 20:59:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 20:59:08,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:59:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 20:59:08,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:59:08,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387713658] [2022-03-17 20:59:08,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:59:08,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098351922] [2022-03-17 20:59:08,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098351922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:59:08,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:59:08,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-17 20:59:08,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355317156] [2022-03-17 20:59:08,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:59:08,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 20:59:08,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:59:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 20:59:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:59:08,354 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:59:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:59:08,807 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-03-17 20:59:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:59:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-17 20:59:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:59:08,808 INFO L225 Difference]: With dead ends: 108 [2022-03-17 20:59:08,808 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 20:59:08,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:59:08,809 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 20:59:08,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 120 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 20:59:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 20:59:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-17 20:59:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:59:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-03-17 20:59:08,816 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 24 [2022-03-17 20:59:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:59:08,816 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-03-17 20:59:08,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:59:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-03-17 20:59:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 20:59:08,816 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:59:08,817 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:59:08,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 20:59:09,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:09,030 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:59:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:59:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2022-03-17 20:59:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:59:09,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969790762] [2022-03-17 20:59:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:59:09,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:59:09,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128020155] [2022-03-17 20:59:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:59:09,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:59:09,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:59:09,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:59:09,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:59:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:59:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 20:59:09,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:59:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:59:09,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:59:28,472 WARN L232 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:59:49,639 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~b~0 2) 4294967296)) (.cse0 (mod c_main_~r~0 4294967296))) (or (not (<= (mod c_main_~b~0 4294967296) .cse0)) (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse1 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse1 .cse0))) is different from true [2022-03-17 21:00:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-03-17 21:00:12,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:00:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969790762] [2022-03-17 21:00:12,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:00:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128020155] [2022-03-17 21:00:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128020155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:00:12,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:00:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-17 21:00:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182635185] [2022-03-17 21:00:12,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:00:12,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:00:12,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:00:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:00:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=4, NotChecked=20, Total=156 [2022-03-17 21:00:12,945 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 21:00:19,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:21,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:23,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:25,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:27,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:30,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:32,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:34,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:36,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:38,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 21:00:41,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:43,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:00:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:00:43,549 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2022-03-17 21:00:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 21:00:43,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-17 21:00:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:00:43,551 INFO L225 Difference]: With dead ends: 130 [2022-03-17 21:00:43,551 INFO L226 Difference]: Without dead ends: 98 [2022-03-17 21:00:43,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=52, Invalid=129, Unknown=5, NotChecked=24, Total=210 [2022-03-17 21:00:43,552 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:00:43,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 160 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 12 Unknown, 38 Unchecked, 26.2s Time] [2022-03-17 21:00:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-17 21:00:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-17 21:00:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 21:00:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-03-17 21:00:43,558 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 27 [2022-03-17 21:00:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:00:43,558 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-03-17 21:00:43,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 21:00:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-03-17 21:00:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 21:00:43,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:00:43,559 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:00:43,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 21:00:43,780 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,SelfDestructingSolverStorable9 [2022-03-17 21:00:43,780 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:00:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:00:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1969058547, now seen corresponding path program 2 times [2022-03-17 21:00:43,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:00:43,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828247473] [2022-03-17 21:00:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:00:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:00:43,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:00:43,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793837533] [2022-03-17 21:00:43,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:00:43,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:00:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:00:43,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:00:43,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 21:00:43,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-17 21:00:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:00:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:00:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:00:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 21:00:43,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:00:43,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:00:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828247473] [2022-03-17 21:00:43,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:00:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793837533] [2022-03-17 21:00:43,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793837533] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:00:43,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:00:43,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:00:43,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574227207] [2022-03-17 21:00:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:00:43,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:00:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:00:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:00:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:00:43,974 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 21:00:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:00:44,023 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-03-17 21:00:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:00:44,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 21:00:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:00:44,024 INFO L225 Difference]: With dead ends: 113 [2022-03-17 21:00:44,024 INFO L226 Difference]: Without dead ends: 110 [2022-03-17 21:00:44,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:00:44,025 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:00:44,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:00:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-17 21:00:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2022-03-17 21:00:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 77 states have internal predecessors, (89), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:00:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2022-03-17 21:00:44,030 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 29 [2022-03-17 21:00:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:00:44,030 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2022-03-17 21:00:44,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 21:00:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2022-03-17 21:00:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 21:00:44,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:00:44,031 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:00:44,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 21:00:44,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:00:44,248 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:00:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:00:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1849486682, now seen corresponding path program 2 times [2022-03-17 21:00:44,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:00:44,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229043211] [2022-03-17 21:00:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:00:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:00:44,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:00:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311298174] [2022-03-17 21:00:44,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:00:44,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:00:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:00:44,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:00:44,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process