/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:26:50,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:26:50,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:26:50,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:26:50,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:26:50,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:26:50,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:26:50,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:26:50,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:26:50,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:26:50,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:26:50,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:26:50,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:26:50,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:26:50,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:26:50,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:26:50,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:26:50,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:26:50,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:26:50,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:26:50,232 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:26:50,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:26:50,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:26:50,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:26:50,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:26:50,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:26:50,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:26:50,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:26:50,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:26:50,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:26:50,269 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:26:50,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:26:50,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:26:50,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:26:50,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:26:50,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:26:50,271 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:26:50,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:26:50,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:26:50,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:26:50,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:26:50,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:26:50,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:26:50,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:26:50,274 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:26:50,274 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:26:50,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:26:50,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:26:50,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:26:50,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:26:50,487 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:26:50,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2022-04-06 11:26:50,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc78896e/fb0034eced6a49608b0aeb66513075b9/FLAG1682d7502 [2022-04-06 11:26:50,884 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:26:50,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2022-04-06 11:26:50,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc78896e/fb0034eced6a49608b0aeb66513075b9/FLAG1682d7502 [2022-04-06 11:26:50,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc78896e/fb0034eced6a49608b0aeb66513075b9 [2022-04-06 11:26:50,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:26:50,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:26:50,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:26:50,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:26:50,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:26:50,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:26:50" (1/1) ... [2022-04-06 11:26:50,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148fea64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:50, skipping insertion in model container [2022-04-06 11:26:50,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:26:50" (1/1) ... [2022-04-06 11:26:50,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:26:50,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:26:51,052 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2022-04-06 11:26:51,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:26:51,082 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:26:51,090 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2022-04-06 11:26:51,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:26:51,102 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:26:51,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51 WrapperNode [2022-04-06 11:26:51,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:26:51,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:26:51,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:26:51,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:26:51,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:26:51,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:26:51,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:26:51,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:26:51,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:26:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:51,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 11:26:51,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 11:26:51,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:26:51,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:26:51,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:26:51,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:26:51,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:26:51,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:26:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:26:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:26:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:26:51,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:26:51,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:26:51,228 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:26:51,230 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:26:51,331 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:26:51,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:26:51,336 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 11:26:51,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:26:51 BoogieIcfgContainer [2022-04-06 11:26:51,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:26:51,338 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:26:51,339 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:26:51,339 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:26:51,342 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:26:51" (1/1) ... [2022-04-06 11:26:51,344 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:26:51,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:26:51 BasicIcfg [2022-04-06 11:26:51,372 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:26:51,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:26:51,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:26:51,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:26:51,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:26:50" (1/4) ... [2022-04-06 11:26:51,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a161ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:26:51, skipping insertion in model container [2022-04-06 11:26:51,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:26:51" (2/4) ... [2022-04-06 11:26:51,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a161ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:26:51, skipping insertion in model container [2022-04-06 11:26:51,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:26:51" (3/4) ... [2022-04-06 11:26:51,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a161ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:26:51, skipping insertion in model container [2022-04-06 11:26:51,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:26:51" (4/4) ... [2022-04-06 11:26:51,379 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.iqvasr [2022-04-06 11:26:51,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:26:51,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:26:51,420 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:26:51,425 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 11:26:51,426 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:26:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 11:26:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 11:26:51,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:51,476 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:26:51,477 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:51,480 INFO L85 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2022-04-06 11:26:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49184105] [2022-04-06 11:26:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:51,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:26:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:51,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:26:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:51,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 11:26:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:51,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49184105] [2022-04-06 11:26:51,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49184105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:26:51,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:26:51,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:26:51,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448494487] [2022-04-06 11:26:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:26:51,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:26:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:26:51,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:26:51,725 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:26:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:51,799 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2022-04-06 11:26:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:26:51,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 23 [2022-04-06 11:26:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:51,809 INFO L225 Difference]: With dead ends: 60 [2022-04-06 11:26:51,809 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 11:26:51,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:26:51,816 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:51,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:26:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 11:26:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 11:26:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 11:26:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-04-06 11:26:51,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-04-06 11:26:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:51,855 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-04-06 11:26:51,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:26:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-06 11:26:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 11:26:51,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:51,859 INFO L499 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] [2022-04-06 11:26:51,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:26:51,859 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2022-04-06 11:26:51,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:51,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701803049] [2022-04-06 11:26:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:51,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:51,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053178911] [2022-04-06 11:26:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:51,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:51,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:51,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:26:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:26:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:52,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:26:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701803049] [2022-04-06 11:26:52,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053178911] [2022-04-06 11:26:52,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053178911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:26:52,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:26:52,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 11:26:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609905220] [2022-04-06 11:26:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:26:52,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 11:26:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 11:26:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:26:52,067 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:26:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:52,085 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-04-06 11:26:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 11:26:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-06 11:26:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:52,087 INFO L225 Difference]: With dead ends: 42 [2022-04-06 11:26:52,087 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 11:26:52,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:26:52,090 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:52,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:26:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 11:26:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 11:26:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 11:26:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-04-06 11:26:52,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-04-06 11:26:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:52,100 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-04-06 11:26:52,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:26:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-04-06 11:26:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 11:26:52,101 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:52,101 INFO L499 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] [2022-04-06 11:26:52,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:26:52,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:52,321 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2022-04-06 11:26:52,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:52,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204801921] [2022-04-06 11:26:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:52,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:52,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922376176] [2022-04-06 11:26:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:52,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:52,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:52,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:52,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:26:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:26:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:52,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:26:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204801921] [2022-04-06 11:26:52,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922376176] [2022-04-06 11:26:52,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922376176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:26:52,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:26:52,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:26:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856728213] [2022-04-06 11:26:52,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:26:52,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:26:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:26:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:26:52,479 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:26:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:52,507 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-04-06 11:26:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:26:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-04-06 11:26:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:52,508 INFO L225 Difference]: With dead ends: 41 [2022-04-06 11:26:52,508 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 11:26:52,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:26:52,509 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:52,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:26:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 11:26:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 11:26:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 11:26:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-04-06 11:26:52,514 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-04-06 11:26:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:52,514 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-04-06 11:26:52,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:26:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-04-06 11:26:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 11:26:52,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:52,515 INFO L499 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] [2022-04-06 11:26:52,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:26:52,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 11:26:52,738 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2022-04-06 11:26:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760684236] [2022-04-06 11:26:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:52,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:52,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:52,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387889797] [2022-04-06 11:26:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:52,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:52,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:26:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 11:26:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:26:53,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:26:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:53,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760684236] [2022-04-06 11:26:53,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387889797] [2022-04-06 11:26:53,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387889797] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:26:53,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:26:53,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 11:26:53,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090279469] [2022-04-06 11:26:53,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:26:53,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:26:53,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:53,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:26:53,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:26:53,207 INFO L87 Difference]: Start difference. First operand 33 states and 40 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:26:55,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:26:57,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:26:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:57,371 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-04-06 11:26:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:26:57,372 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-04-06 11:26:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:57,372 INFO L225 Difference]: With dead ends: 42 [2022-04-06 11:26:57,373 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 11:26:57,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:26:57,373 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:57,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 104 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 11:26:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 11:26:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 11:26:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 11:26:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-04-06 11:26:57,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-04-06 11:26:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:57,380 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-04-06 11:26:57,380 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:26:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-04-06 11:26:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 11:26:57,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:57,381 INFO L499 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] [2022-04-06 11:26:57,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 11:26:57,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:57,588 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2022-04-06 11:26:57,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:57,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253579365] [2022-04-06 11:26:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:57,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874265633] [2022-04-06 11:26:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:57,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:57,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:57,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:26:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:57,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:26:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:57,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:26:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253579365] [2022-04-06 11:26:57,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874265633] [2022-04-06 11:26:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874265633] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:26:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:26:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 11:26:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197911398] [2022-04-06 11:26:57,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:26:57,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:26:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:26:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:26:57,770 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:26:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:57,845 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-04-06 11:26:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:26:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-04-06 11:26:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:57,847 INFO L225 Difference]: With dead ends: 73 [2022-04-06 11:26:57,847 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 11:26:57,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:26:57,848 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:57,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 122 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:26:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 11:26:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2022-04-06 11:26:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 11:26:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-04-06 11:26:57,854 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2022-04-06 11:26:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:57,854 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-04-06 11:26:57,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:26:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-04-06 11:26:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 11:26:57,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:57,855 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:26:57,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:26:58,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:58,072 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:58,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2022-04-06 11:26:58,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:58,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843901857] [2022-04-06 11:26:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:58,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:58,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:58,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828999839] [2022-04-06 11:26:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:58,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:58,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:26:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:26:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:58,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:26:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:58,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843901857] [2022-04-06 11:26:58,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:58,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828999839] [2022-04-06 11:26:58,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828999839] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:26:58,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:26:58,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 11:26:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350695607] [2022-04-06 11:26:58,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:26:58,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:26:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:26:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:26:58,284 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:26:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:58,392 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-04-06 11:26:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:26:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-04-06 11:26:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:58,393 INFO L225 Difference]: With dead ends: 98 [2022-04-06 11:26:58,393 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 11:26:58,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:26:58,394 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:58,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 184 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:26:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 11:26:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-04-06 11:26:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 67 states have internal predecessors, (85), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 11:26:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-04-06 11:26:58,402 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2022-04-06 11:26:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:58,402 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-04-06 11:26:58,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:26:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-04-06 11:26:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 11:26:58,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:58,403 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:26:58,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:26:58,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:58,620 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2022-04-06 11:26:58,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:58,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848448349] [2022-04-06 11:26:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:58,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:58,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535973467] [2022-04-06 11:26:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:58,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:58,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:58,631 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:58,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:26:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 11:26:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:26:58,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:26:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:59,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848448349] [2022-04-06 11:26:59,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:59,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535973467] [2022-04-06 11:26:59,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535973467] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:26:59,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:26:59,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 11:26:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523704426] [2022-04-06 11:26:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:26:59,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:26:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:26:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:26:59,057 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:26:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:59,080 INFO L93 Difference]: Finished difference Result 117 states and 143 transitions. [2022-04-06 11:26:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:26:59,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-06 11:26:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:59,082 INFO L225 Difference]: With dead ends: 117 [2022-04-06 11:26:59,082 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 11:26:59,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:26:59,083 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:59,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-04-06 11:26:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 11:26:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-04-06 11:26:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:26:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-04-06 11:26:59,093 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 29 [2022-04-06 11:26:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:59,093 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-04-06 11:26:59,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:26:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-04-06 11:26:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 11:26:59,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:59,094 INFO L499 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] [2022-04-06 11:26:59,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:26:59,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:59,310 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -665062919, now seen corresponding path program 1 times [2022-04-06 11:26:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:59,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316518224] [2022-04-06 11:26:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:59,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:59,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003388097] [2022-04-06 11:26:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:59,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:59,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:59,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:59,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:26:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 11:26:59,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:26:59,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:26:59,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316518224] [2022-04-06 11:26:59,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003388097] [2022-04-06 11:26:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003388097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:26:59,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:26:59,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:26:59,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332843671] [2022-04-06 11:26:59,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:26:59,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:26:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:59,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:26:59,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:26:59,423 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:26:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:26:59,442 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2022-04-06 11:26:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:26:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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 35 [2022-04-06 11:26:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:26:59,444 INFO L225 Difference]: With dead ends: 155 [2022-04-06 11:26:59,444 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 11:26:59,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:26:59,445 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:26:59,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:26:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 11:26:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 11:26:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:26:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-04-06 11:26:59,470 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 35 [2022-04-06 11:26:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:26:59,471 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-04-06 11:26:59,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:26:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-04-06 11:26:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 11:26:59,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:26:59,474 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:26:59,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:26:59,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:59,688 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:26:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:26:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1800746756, now seen corresponding path program 1 times [2022-04-06 11:26:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:26:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262720639] [2022-04-06 11:26:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:59,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:26:59,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:26:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110159392] [2022-04-06 11:26:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:26:59,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:26:59,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:26:59,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:26:59,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:26:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:26:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 11:26:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:26:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 11:26:59,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:26:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 11:26:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:26:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262720639] [2022-04-06 11:26:59,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:26:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110159392] [2022-04-06 11:26:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110159392] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:26:59,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:26:59,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 11:26:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700243206] [2022-04-06 11:26:59,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:26:59,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:26:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:26:59,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:26:59,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:26:59,931 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 11:27:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:27:00,051 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-04-06 11:27:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:27:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-04-06 11:27:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:27:00,053 INFO L225 Difference]: With dead ends: 115 [2022-04-06 11:27:00,053 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 11:27:00,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:27:00,054 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:27:00,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 173 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:27:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 11:27:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-04-06 11:27:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:27:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-04-06 11:27:00,060 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2022-04-06 11:27:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:27:00,060 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-04-06 11:27:00,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 11:27:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-04-06 11:27:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 11:27:00,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:27:00,061 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:27:00,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:27:00,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 11:27:00,276 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:27:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:27:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2022-04-06 11:27:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:27:00,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758111010] [2022-04-06 11:27:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:27:00,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:27:00,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:27:00,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746725234] [2022-04-06 11:27:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:27:00,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:27:00,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:27:00,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:27:00,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process