/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:43:55,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:43:55,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:43:55,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:43:55,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:43:55,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:43:55,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:43:55,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:43:55,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:43:55,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:43:55,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:43:55,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:43:55,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:43:55,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:43:55,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:43:55,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:43:55,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:43:55,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:43:55,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:43:55,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:43:55,419 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:43:55,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:43:55,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:43:55,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:43:55,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:43:55,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 22:43:55,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 22:43:55,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 22:43:55,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 22:43:55,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 22:43:55,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-18 22:43:55,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:43:55,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:43:55,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:43:55,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:43:55,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:43:55,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:43:55,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:43:55,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:43:55,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:43:55,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:43:55,454 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:43:55,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:43:55,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:43:55,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:43:55,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:43:55,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:43:55,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:43:55,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:43:55,456 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:43:55,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:43:55,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:43:55,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:43:55,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:43:55,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:43:55,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:43:55,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:43:55,458 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:43:55,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:43:55,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:43:55,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:43:55,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:43:55,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:43:55,724 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:43:55,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-18 22:43:55,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bb614d6/63296e204edf44618197c2bac52507db/FLAG098866ea1 [2022-03-18 22:43:56,158 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:43:56,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-18 22:43:56,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bb614d6/63296e204edf44618197c2bac52507db/FLAG098866ea1 [2022-03-18 22:43:56,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bb614d6/63296e204edf44618197c2bac52507db [2022-03-18 22:43:56,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:43:56,185 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:43:56,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:43:56,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:43:56,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:43:56,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c1af8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56, skipping insertion in model container [2022-03-18 22:43:56,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:43:56,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:43:56,352 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/egcd3-ll.c[490,503] [2022-03-18 22:43:56,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:43:56,387 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:43:56,395 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/egcd3-ll.c[490,503] [2022-03-18 22:43:56,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:43:56,413 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:43:56,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56 WrapperNode [2022-03-18 22:43:56,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:43:56,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:43:56,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:43:56,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:43:56,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:43:56,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:43:56,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:43:56,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:43:56,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:43:56,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:56,472 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) [2022-03-18 22:43:56,474 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 [2022-03-18 22:43:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:43:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:43:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:43:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 22:43:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:43:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:43:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:43:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:43:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:43:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:43:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:43:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:43:56,551 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:43:56,552 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:43:56,658 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:43:56,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:43:56,665 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 22:43:56,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:43:56 BoogieIcfgContainer [2022-03-18 22:43:56,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:43:56,666 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:43:56,667 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:43:56,667 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:43:56,670 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:43:56" (1/1) ... [2022-03-18 22:43:56,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:43:56 BasicIcfg [2022-03-18 22:43:56,692 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:43:56,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:43:56,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:43:56,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:43:56,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:43:56" (1/4) ... [2022-03-18 22:43:56,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70118d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:43:56, skipping insertion in model container [2022-03-18 22:43:56,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (2/4) ... [2022-03-18 22:43:56,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70118d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:43:56, skipping insertion in model container [2022-03-18 22:43:56,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:43:56" (3/4) ... [2022-03-18 22:43:56,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70118d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:43:56, skipping insertion in model container [2022-03-18 22:43:56,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:43:56" (4/4) ... [2022-03-18 22:43:56,700 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.cqvasr [2022-03-18 22:43:56,704 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:43:56,705 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:43:56,740 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:43:56,746 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 [2022-03-18 22:43:56,746 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:43:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 22:43:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 22:43:56,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:56,764 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:56,764 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1332561126, now seen corresponding path program 1 times [2022-03-18 22:43:56,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:56,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232025844] [2022-03-18 22:43:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:56,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:43:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:56,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 22:43:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:56,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 22:43:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:43:56,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232025844] [2022-03-18 22:43:56,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232025844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:43:56,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:43:56,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:43:56,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483024248] [2022-03-18 22:43:56,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:43:56,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:43:56,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:43:56,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:43:56,937 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:57,013 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-03-18 22:43:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:43:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 22:43:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:57,021 INFO L225 Difference]: With dead ends: 67 [2022-03-18 22:43:57,021 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 22:43:57,023 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:43:57,026 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:57,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:43:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 22:43:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 22:43:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:43:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-18 22:43:57,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-18 22:43:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:57,083 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-18 22:43:57,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-18 22:43:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 22:43:57,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:57,085 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] [2022-03-18 22:43:57,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:43:57,085 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1285593101, now seen corresponding path program 1 times [2022-03-18 22:43:57,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818095070] [2022-03-18 22:43:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:57,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:57,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:43:57,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176589052] [2022-03-18 22:43:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:57,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:57,107 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) [2022-03-18 22:43:57,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:43:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:43:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:43:57,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:43:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818095070] [2022-03-18 22:43:57,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:43:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176589052] [2022-03-18 22:43:57,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176589052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:43:57,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:43:57,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 22:43:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468755137] [2022-03-18 22:43:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:43:57,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 22:43:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 22:43:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:43:57,265 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:43:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:57,329 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-03-18 22:43:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 22:43:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 22:43:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:57,331 INFO L225 Difference]: With dead ends: 51 [2022-03-18 22:43:57,331 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 22:43:57,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:43:57,333 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:57,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 145 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:43:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 22:43:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-03-18 22:43:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:43:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-18 22:43:57,344 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-03-18 22:43:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:57,345 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-18 22:43:57,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:43:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-18 22:43:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 22:43:57,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:57,346 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, 1, 1] [2022-03-18 22:43:57,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:57,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:57,570 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1248058574, now seen corresponding path program 1 times [2022-03-18 22:43:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:57,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341983083] [2022-03-18 22:43:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:57,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:43:57,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467052021] [2022-03-18 22:43:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:57,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:57,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:57,602 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) [2022-03-18 22:43:57,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:43:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 22:43:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:43:57,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:43:57,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:57,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341983083] [2022-03-18 22:43:57,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:43:57,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467052021] [2022-03-18 22:43:57,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467052021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:43:57,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:43:57,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 22:43:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908877426] [2022-03-18 22:43:57,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:43:57,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 22:43:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 22:43:57,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:43:57,914 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:43:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:58,015 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-03-18 22:43:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 22:43:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-18 22:43:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:58,019 INFO L225 Difference]: With dead ends: 50 [2022-03-18 22:43:58,020 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 22:43:58,021 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:43:58,023 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:58,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 200 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:43:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 22:43:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-18 22:43:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 22:43:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-18 22:43:58,049 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26 [2022-03-18 22:43:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:58,050 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-18 22:43:58,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 22:43:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-18 22:43:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 22:43:58,052 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:58,053 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, 1, 1, 1, 1] [2022-03-18 22:43:58,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:58,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 22:43:58,276 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2002833725, now seen corresponding path program 1 times [2022-03-18 22:43:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:58,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190163641] [2022-03-18 22:43:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:58,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:58,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:43:58,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187831836] [2022-03-18 22:43:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:58,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:58,296 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) [2022-03-18 22:43:58,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:43:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 22:43:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:43:58,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:43:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190163641] [2022-03-18 22:43:58,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:43:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187831836] [2022-03-18 22:43:58,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187831836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:58,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:43:58,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 22:43:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123713634] [2022-03-18 22:43:58,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:58,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 22:43:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 22:43:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:43:58,521 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:58,666 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-18 22:43:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:43:58,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-18 22:43:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:58,668 INFO L225 Difference]: With dead ends: 100 [2022-03-18 22:43:58,668 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 22:43:58,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:43:58,669 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:58,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 278 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:43:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 22:43:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-18 22:43:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 22:43:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-18 22:43:58,684 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-18 22:43:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:58,685 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-18 22:43:58,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 22:43:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-18 22:43:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 22:43:58,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:58,686 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:43:58,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:58,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:58,908 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1141865733, now seen corresponding path program 1 times [2022-03-18 22:43:58,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:58,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219353907] [2022-03-18 22:43:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:58,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:58,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:43:58,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90519190] [2022-03-18 22:43:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:58,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:58,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:58,929 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) [2022-03-18 22:43:58,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:43:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 22:43:58,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:43:59,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:43:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219353907] [2022-03-18 22:43:59,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:43:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90519190] [2022-03-18 22:43:59,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90519190] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 22:43:59,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 22:43:59,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 22:43:59,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174229302] [2022-03-18 22:43:59,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:43:59,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:43:59,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:43:59,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:43:59,224 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:43:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:43:59,268 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-03-18 22:43:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:43:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-03-18 22:43:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:43:59,271 INFO L225 Difference]: With dead ends: 76 [2022-03-18 22:43:59,271 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 22:43:59,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:43:59,273 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:43:59,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:43:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 22:43:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-18 22:43:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 22:43:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-18 22:43:59,302 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 31 [2022-03-18 22:43:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:43:59,303 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-18 22:43:59,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 22:43:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-18 22:43:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 22:43:59,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:43:59,307 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, 1, 1, 1, 1] [2022-03-18 22:43:59,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 22:43:59,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:59,523 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:43:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:43:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1101190558, now seen corresponding path program 1 times [2022-03-18 22:43:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:43:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420847004] [2022-03-18 22:43:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:59,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:43:59,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:43:59,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040601841] [2022-03-18 22:43:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:43:59,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:43:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:43:59,536 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) [2022-03-18 22:43:59,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:43:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:43:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 22:43:59,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:43:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:43:59,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:43:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:43:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:43:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420847004] [2022-03-18 22:43:59,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:43:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040601841] [2022-03-18 22:43:59,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040601841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:43:59,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:43:59,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-18 22:43:59,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058263817] [2022-03-18 22:43:59,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:43:59,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 22:43:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:43:59,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 22:43:59,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:43:59,853 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 22:44:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:00,010 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-03-18 22:44:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:44:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2022-03-18 22:44:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:00,014 INFO L225 Difference]: With dead ends: 108 [2022-03-18 22:44:00,014 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 22:44:00,015 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:44:00,016 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:00,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 346 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:44:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 22:44:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-03-18 22:44:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 22:44:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-18 22:44:00,034 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-18 22:44:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:00,035 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-18 22:44:00,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 22:44:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-18 22:44:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 22:44:00,036 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:00,036 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:00,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:00,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:00,260 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash -41147214, now seen corresponding path program 1 times [2022-03-18 22:44:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:00,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777722868] [2022-03-18 22:44:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:00,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:00,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419065161] [2022-03-18 22:44:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:00,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:00,280 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) [2022-03-18 22:44:00,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:44:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:44:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 22:44:00,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:44:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777722868] [2022-03-18 22:44:00,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419065161] [2022-03-18 22:44:00,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419065161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:00,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:00,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 22:44:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181640078] [2022-03-18 22:44:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:00,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:44:00,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:44:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:44:00,412 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 22:44:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:00,483 INFO L93 Difference]: Finished difference Result 148 states and 208 transitions. [2022-03-18 22:44:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:44:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-18 22:44:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:00,490 INFO L225 Difference]: With dead ends: 148 [2022-03-18 22:44:00,490 INFO L226 Difference]: Without dead ends: 146 [2022-03-18 22:44:00,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:44:00,491 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:00,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:44:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-18 22:44:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-03-18 22:44:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 22:44:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 200 transitions. [2022-03-18 22:44:00,514 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 200 transitions. Word has length 36 [2022-03-18 22:44:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:00,514 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 200 transitions. [2022-03-18 22:44:00,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 22:44:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 200 transitions. [2022-03-18 22:44:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 22:44:00,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:00,515 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:00,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:00,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:00,728 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1201961419, now seen corresponding path program 1 times [2022-03-18 22:44:00,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:00,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043606388] [2022-03-18 22:44:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:00,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:00,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:00,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882936919] [2022-03-18 22:44:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:00,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:00,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:00,746 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) [2022-03-18 22:44:00,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:44:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 22:44:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:44:01,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:44:01,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043606388] [2022-03-18 22:44:01,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882936919] [2022-03-18 22:44:01,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882936919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:01,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:44:01,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 22:44:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373314721] [2022-03-18 22:44:01,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:01,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 22:44:01,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 22:44:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-18 22:44:01,163 INFO L87 Difference]: Start difference. First operand 140 states and 200 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 22:44:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:02,475 INFO L93 Difference]: Finished difference Result 268 states and 390 transitions. [2022-03-18 22:44:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 22:44:02,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2022-03-18 22:44:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:02,477 INFO L225 Difference]: With dead ends: 268 [2022-03-18 22:44:02,477 INFO L226 Difference]: Without dead ends: 266 [2022-03-18 22:44:02,478 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-18 22:44:02,479 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 142 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:02,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 399 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 22:44:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-18 22:44:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 253. [2022-03-18 22:44:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 159 states have internal predecessors, (207), 85 states have call successors, (85), 10 states have call predecessors, (85), 9 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 22:44:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2022-03-18 22:44:02,513 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 36 [2022-03-18 22:44:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:02,513 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2022-03-18 22:44:02,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 22:44:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2022-03-18 22:44:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 22:44:02,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:02,514 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:02,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:02,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:02,737 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2036500795, now seen corresponding path program 1 times [2022-03-18 22:44:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:02,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526301907] [2022-03-18 22:44:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:02,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132717509] [2022-03-18 22:44:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:02,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:02,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:02,750 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) [2022-03-18 22:44:02,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:44:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:44:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 22:44:02,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:44:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526301907] [2022-03-18 22:44:02,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:02,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132717509] [2022-03-18 22:44:02,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132717509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:44:02,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:44:02,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 22:44:02,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437987508] [2022-03-18 22:44:02,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:44:02,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 22:44:02,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 22:44:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:44:02,877 INFO L87 Difference]: Start difference. First operand 253 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 22:44:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:02,977 INFO L93 Difference]: Finished difference Result 414 states and 645 transitions. [2022-03-18 22:44:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 22:44:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-18 22:44:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:02,982 INFO L225 Difference]: With dead ends: 414 [2022-03-18 22:44:02,983 INFO L226 Difference]: Without dead ends: 412 [2022-03-18 22:44:02,984 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:44:02,986 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:02,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:44:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-18 22:44:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 357. [2022-03-18 22:44:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 181 states have (on average 1.270718232044199) internal successors, (230), 202 states have internal predecessors, (230), 165 states have call successors, (165), 11 states have call predecessors, (165), 10 states have return successors, (163), 143 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 22:44:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 558 transitions. [2022-03-18 22:44:03,051 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 558 transitions. Word has length 41 [2022-03-18 22:44:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:03,052 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 558 transitions. [2022-03-18 22:44:03,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 22:44:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 558 transitions. [2022-03-18 22:44:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 22:44:03,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:03,057 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:03,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:03,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 22:44:03,275 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash -379845647, now seen corresponding path program 1 times [2022-03-18 22:44:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:03,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66034489] [2022-03-18 22:44:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:03,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:03,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771858513] [2022-03-18 22:44:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:03,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:03,286 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) [2022-03-18 22:44:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 22:44:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:03,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 22:44:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 22:44:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:44:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 22:44:04,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:44:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66034489] [2022-03-18 22:44:04,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 22:44:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771858513] [2022-03-18 22:44:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771858513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:44:04,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:44:04,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 22:44:04,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644352128] [2022-03-18 22:44:04,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:44:04,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 22:44:04,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:44:04,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 22:44:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-18 22:44:04,635 INFO L87 Difference]: Start difference. First operand 357 states and 558 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 22:44:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:44:10,535 INFO L93 Difference]: Finished difference Result 713 states and 1105 transitions. [2022-03-18 22:44:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 22:44:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 53 [2022-03-18 22:44:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:44:10,540 INFO L225 Difference]: With dead ends: 713 [2022-03-18 22:44:10,540 INFO L226 Difference]: Without dead ends: 546 [2022-03-18 22:44:10,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 22:44:10,543 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 129 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:44:10,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 450 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-18 22:44:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-18 22:44:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 465. [2022-03-18 22:44:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 261 states have (on average 1.260536398467433) internal successors, (329), 280 states have internal predecessors, (329), 189 states have call successors, (189), 15 states have call predecessors, (189), 14 states have return successors, (187), 169 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-18 22:44:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 705 transitions. [2022-03-18 22:44:10,648 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 705 transitions. Word has length 53 [2022-03-18 22:44:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:44:10,648 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 705 transitions. [2022-03-18 22:44:10,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 22:44:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 705 transitions. [2022-03-18 22:44:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 22:44:10,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:44:10,650 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:44:10,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 22:44:10,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 22:44:10,863 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:44:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:44:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1179170910, now seen corresponding path program 1 times [2022-03-18 22:44:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:44:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520190484] [2022-03-18 22:44:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:10,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:44:10,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 22:44:10,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187454561] [2022-03-18 22:44:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:44:10,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:44:10,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:44:10,876 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) [2022-03-18 22:44:10,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 22:44:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:44:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 22:44:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:44:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-03-18 22:44:11,276 INFO L328 TraceCheckSpWp]: Computing backward predicates...