/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/hard-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 08:10:10,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 08:10:10,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 08:10:10,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 08:10:10,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 08:10:10,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 08:10:10,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 08:10:10,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 08:10:10,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 08:10:10,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 08:10:10,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 08:10:10,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 08:10:10,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 08:10:10,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 08:10:10,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 08:10:10,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 08:10:10,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 08:10:10,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 08:10:10,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 08:10:10,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 08:10:10,284 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 08:10:10,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 08:10:10,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 08:10:10,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 08:10:10,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 08:10:10,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 08:10:10,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 08:10:10,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 08:10:10,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 08:10:10,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 08:10:10,326 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 08:10:10,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 08:10:10,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 08:10:10,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 08:10:10,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 08:10:10,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 08:10:10,328 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 08:10:10,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 08:10:10,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 08:10:10,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 08:10:10,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:10:10,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 08:10:10,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 08:10:10,331 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 08:10:10,331 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 08:10:10,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 08:10:10,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 08:10:10,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 08:10:10,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 08:10:10,526 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 08:10:10,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2022-04-05 08:10:10,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0773ceb72/50815d0263a049c8bb1fe1dc4c69e1c6/FLAGf4b719cd4 [2022-04-05 08:10:10,914 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 08:10:10,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2022-04-05 08:10:10,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0773ceb72/50815d0263a049c8bb1fe1dc4c69e1c6/FLAGf4b719cd4 [2022-04-05 08:10:10,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0773ceb72/50815d0263a049c8bb1fe1dc4c69e1c6 [2022-04-05 08:10:10,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 08:10:10,929 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 08:10:10,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 08:10:10,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 08:10:10,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 08:10:10,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:10:10" (1/1) ... [2022-04-05 08:10:10,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b7ee55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:10, skipping insertion in model container [2022-04-05 08:10:10,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:10:10" (1/1) ... [2022-04-05 08:10:10,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 08:10:10,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 08:10:11,057 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/hard-u_unwindbound5.c[537,550] [2022-04-05 08:10:11,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:10:11,084 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 08:10:11,094 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/hard-u_unwindbound5.c[537,550] [2022-04-05 08:10:11,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:10:11,108 INFO L208 MainTranslator]: Completed translation [2022-04-05 08:10:11,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11 WrapperNode [2022-04-05 08:10:11,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 08:10:11,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 08:10:11,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 08:10:11,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 08:10:11,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 08:10:11,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 08:10:11,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 08:10:11,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 08:10:11,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:10:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:11,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 08:10:11,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 08:10:11,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 08:10:11,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 08:10:11,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 08:10:11,186 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 08:10:11,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 08:10:11,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 08:10:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 08:10:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 08:10:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 08:10:11,235 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 08:10:11,236 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 08:10:11,363 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 08:10:11,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 08:10:11,367 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 08:10:11,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:10:11 BoogieIcfgContainer [2022-04-05 08:10:11,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 08:10:11,369 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 08:10:11,369 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 08:10:11,369 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 08:10:11,371 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:10:11" (1/1) ... [2022-04-05 08:10:11,373 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 08:10:11,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:10:11 BasicIcfg [2022-04-05 08:10:11,386 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 08:10:11,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 08:10:11,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 08:10:11,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 08:10:11,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 08:10:10" (1/4) ... [2022-04-05 08:10:11,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2784c0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:10:11, skipping insertion in model container [2022-04-05 08:10:11,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:11" (2/4) ... [2022-04-05 08:10:11,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2784c0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:10:11, skipping insertion in model container [2022-04-05 08:10:11,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:10:11" (3/4) ... [2022-04-05 08:10:11,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2784c0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 08:10:11, skipping insertion in model container [2022-04-05 08:10:11,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:10:11" (4/4) ... [2022-04-05 08:10:11,391 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.cqvasr [2022-04-05 08:10:11,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 08:10:11,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 08:10:11,422 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 08:10:11,426 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 08:10:11,426 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 08:10:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 08:10:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:10:11,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:11,439 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:11,439 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-04-05 08:10:11,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120232526] [2022-04-05 08:10:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:11,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:10:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:10:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:11,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120232526] [2022-04-05 08:10:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120232526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:11,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 08:10:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084596472] [2022-04-05 08:10:11,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:11,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 08:10:11,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 08:10:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:10:11,582 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:10:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:11,641 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-04-05 08:10:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 08:10:11,643 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 08:10:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:11,648 INFO L225 Difference]: With dead ends: 66 [2022-04-05 08:10:11,648 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 08:10:11,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:10:11,652 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:11,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:10:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 08:10:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-05 08:10:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-05 08:10:11,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-05 08:10:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:11,677 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-05 08:10:11,677 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:10:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-05 08:10:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:10:11,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:11,678 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:11,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 08:10:11,678 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:11,679 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-04-05 08:10:11,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:11,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659138179] [2022-04-05 08:10:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:11,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:10:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:10:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:11,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:11,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659138179] [2022-04-05 08:10:11,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659138179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:11,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:11,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:10:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434588055] [2022-04-05 08:10:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:11,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:11,749 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:10:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:11,901 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-05 08:10:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 08:10:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 08:10:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:11,904 INFO L225 Difference]: With dead ends: 47 [2022-04-05 08:10:11,904 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 08:10:11,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:10:11,911 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:11,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 08:10:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-05 08:10:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-05 08:10:11,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-05 08:10:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:11,931 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-05 08:10:11,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:10:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-05 08:10:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 08:10:11,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:11,932 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:11,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 08:10:11,932 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-04-05 08:10:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:11,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508470198] [2022-04-05 08:10:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:11,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:11,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763949246] [2022-04-05 08:10:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:11,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:11,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:11,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 08:10:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 08:10:12,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:12,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:12,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:12,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508470198] [2022-04-05 08:10:12,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:12,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763949246] [2022-04-05 08:10:12,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763949246] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:12,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:12,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 08:10:12,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171530556] [2022-04-05 08:10:12,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:12,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 08:10:12,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:12,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 08:10:12,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:10:12,113 INFO L87 Difference]: Start difference. First operand 36 states and 45 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 08:10:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:12,123 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-04-05 08:10:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 08:10:12,124 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-05 08:10:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:12,125 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:10:12,125 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 08:10:12,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:10:12,126 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 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 [2022-04-05 08:10:12,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:10:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 08:10:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-05 08:10:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-05 08:10:12,130 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-05 08:10:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:12,131 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-05 08:10:12,132 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 08:10:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-05 08:10:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 08:10:12,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:12,133 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:12,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 08:10:12,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:12,347 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-04-05 08:10:12,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:12,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812239101] [2022-04-05 08:10:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:12,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:12,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:10:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:12,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:10:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 08:10:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:12,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812239101] [2022-04-05 08:10:12,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812239101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:12,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:12,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:10:12,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028333175] [2022-04-05 08:10:12,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:12,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:12,457 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:10:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:12,585 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 08:10:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 08:10:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 08:10:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:12,588 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:10:12,588 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 08:10:12,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:10:12,594 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:12,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 08:10:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-05 08:10:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-05 08:10:12,609 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-05 08:10:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:12,610 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-05 08:10:12,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:10:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-05 08:10:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:10:12,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:12,610 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:12,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 08:10:12,611 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-04-05 08:10:12,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:12,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511913450] [2022-04-05 08:10:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:12,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:12,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611722483] [2022-04-05 08:10:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:12,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:12,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:12,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 08:10:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:12,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:10:12,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:10:12,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511913450] [2022-04-05 08:10:12,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611722483] [2022-04-05 08:10:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611722483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:12,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:12,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:10:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134706278] [2022-04-05 08:10:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:12,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:10:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:10:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:10:12,759 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:10:14,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 08:10:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:14,961 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-04-05 08:10:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:10:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 08:10:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:14,962 INFO L225 Difference]: With dead ends: 59 [2022-04-05 08:10:14,962 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 08:10:14,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:14,962 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:14,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 08:10:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 08:10:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-05 08:10:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 08:10:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-04-05 08:10:14,968 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-04-05 08:10:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:14,968 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-04-05 08:10:14,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:10:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-04-05 08:10:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 08:10:14,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:14,969 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:14,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:15,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:15,181 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-04-05 08:10:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:15,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934585508] [2022-04-05 08:10:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:15,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:15,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926949540] [2022-04-05 08:10:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:15,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:15,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:15,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:15,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 08:10:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:10:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:15,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934585508] [2022-04-05 08:10:15,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926949540] [2022-04-05 08:10:15,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926949540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:15,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:15,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:10:15,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925923848] [2022-04-05 08:10:15,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:15,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:10:15,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:10:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:10:15,313 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:10:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:15,341 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-04-05 08:10:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:10:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-05 08:10:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:15,344 INFO L225 Difference]: With dead ends: 76 [2022-04-05 08:10:15,344 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 08:10:15,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:10:15,345 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:15,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:10:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 08:10:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-05 08:10:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 08:10:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-04-05 08:10:15,350 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-04-05 08:10:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:15,350 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-04-05 08:10:15,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:10:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-04-05 08:10:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 08:10:15,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:15,351 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:15,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:15,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:15,559 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-04-05 08:10:15,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:15,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241736588] [2022-04-05 08:10:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:15,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:15,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552457061] [2022-04-05 08:10:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:15,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:15,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:15,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 08:10:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 08:10:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:15,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:15,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241736588] [2022-04-05 08:10:15,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552457061] [2022-04-05 08:10:15,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552457061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:15,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:15,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:10:15,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916849936] [2022-04-05 08:10:15,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:15,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:15,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:15,750 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 08:10:16,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:10:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:16,972 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-04-05 08:10:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 08:10:16,972 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), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 08:10:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:16,973 INFO L225 Difference]: With dead ends: 82 [2022-04-05 08:10:16,973 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 08:10:16,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:10:16,974 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:16,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 162 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 08:10:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 08:10:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-05 08:10:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 08:10:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-04-05 08:10:16,980 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-04-05 08:10:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:16,980 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-04-05 08:10:16,980 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), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 08:10:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-04-05 08:10:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 08:10:16,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:16,981 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:16,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:17,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:17,187 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-04-05 08:10:17,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951117073] [2022-04-05 08:10:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:17,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:17,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728638421] [2022-04-05 08:10:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:17,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:17,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:17,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:17,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 08:10:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:10:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:17,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:10:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:17,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:17,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951117073] [2022-04-05 08:10:17,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:17,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728638421] [2022-04-05 08:10:17,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728638421] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:10:17,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:10:17,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 08:10:17,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571562746] [2022-04-05 08:10:17,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:10:17,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 08:10:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 08:10:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:10:17,422 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 08:10:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:17,524 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-04-05 08:10:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 08:10:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-04-05 08:10:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:17,527 INFO L225 Difference]: With dead ends: 160 [2022-04-05 08:10:17,527 INFO L226 Difference]: Without dead ends: 146 [2022-04-05 08:10:17,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:10:17,528 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:17,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-05 08:10:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-04-05 08:10:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-05 08:10:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-04-05 08:10:17,541 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-04-05 08:10:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:17,541 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-04-05 08:10:17,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 08:10:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-04-05 08:10:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 08:10:17,542 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:17,542 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:17,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:17,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:17,758 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-04-05 08:10:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:17,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27103442] [2022-04-05 08:10:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:17,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:17,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260579342] [2022-04-05 08:10:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:17,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:17,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:17,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:17,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 08:10:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 08:10:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 08:10:18,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:10:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 08:10:18,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27103442] [2022-04-05 08:10:18,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260579342] [2022-04-05 08:10:18,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260579342] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 08:10:18,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 08:10:18,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-05 08:10:18,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431565519] [2022-04-05 08:10:18,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:18,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:18,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:18,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:10:18,295 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 08:10:20,333 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 [] [2022-04-05 08:10:22,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:10:24,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:10:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:25,615 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-04-05 08:10:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:10:25,616 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-04-05 08:10:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:25,617 INFO L225 Difference]: With dead ends: 162 [2022-04-05 08:10:25,617 INFO L226 Difference]: Without dead ends: 160 [2022-04-05 08:10:25,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 08:10:25,618 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:25,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2022-04-05 08:10:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-05 08:10:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-04-05 08:10:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 08:10:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-04-05 08:10:25,628 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-04-05 08:10:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:25,629 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-04-05 08:10:25,629 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 08:10:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-04-05 08:10:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 08:10:25,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:25,638 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:25,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:25,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:25,844 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-04-05 08:10:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424716938] [2022-04-05 08:10:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:25,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:25,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198366493] [2022-04-05 08:10:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:25,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:25,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 08:10:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:25,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 08:10:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 08:10:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:10:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 08:10:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:26,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424716938] [2022-04-05 08:10:26,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:26,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198366493] [2022-04-05 08:10:26,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198366493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:10:26,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:10:26,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-05 08:10:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129194976] [2022-04-05 08:10:26,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:10:26,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 08:10:26,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 08:10:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-05 08:10:26,104 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-05 08:10:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:26,749 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2022-04-05 08:10:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 08:10:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 50 [2022-04-05 08:10:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:26,751 INFO L225 Difference]: With dead ends: 234 [2022-04-05 08:10:26,751 INFO L226 Difference]: Without dead ends: 210 [2022-04-05 08:10:26,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-04-05 08:10:26,753 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:26,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 286 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 08:10:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-05 08:10:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2022-04-05 08:10:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 141 states have internal predecessors, (157), 47 states have call successors, (47), 26 states have call predecessors, (47), 25 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-05 08:10:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2022-04-05 08:10:26,766 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 50 [2022-04-05 08:10:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:26,766 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2022-04-05 08:10:26,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-05 08:10:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2022-04-05 08:10:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 08:10:26,770 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:26,771 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:26,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:26,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:26,984 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-04-05 08:10:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606138971] [2022-04-05 08:10:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:26,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:26,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:26,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490133792] [2022-04-05 08:10:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:26,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:26,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:26,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process