/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/ps5-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 09:13:38,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 09:13:38,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 09:13:38,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 09:13:38,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 09:13:38,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 09:13:38,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 09:13:38,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 09:13:38,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 09:13:38,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 09:13:38,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 09:13:38,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 09:13:38,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 09:13:38,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 09:13:38,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 09:13:38,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 09:13:38,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 09:13:38,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 09:13:38,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 09:13:38,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 09:13:38,445 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 09:13:38,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 09:13:38,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 09:13:38,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 09:13:38,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 09:13:38,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 09:13:38,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 09:13:38,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 09:13:38,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 09:13:38,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 09:13:38,484 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 09:13:38,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 09:13:38,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 09:13:38,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 09:13:38,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 09:13:38,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 09:13:38,486 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 09:13:38,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 09:13:38,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 09:13:38,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 09:13:38,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 09:13:38,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 09:13:38,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 09:13:38,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 09:13:38,487 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 09:13:38,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 09:13:38,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 09:13:38,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 09:13:38,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 09:13:38,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:13:38,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 09:13:38,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 09:13:38,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 09:13:38,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 09:13:38,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 09:13:38,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 09:13:38,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 09:13:38,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 09:13:38,489 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 09:13:38,490 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 09:13:38,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 09:13:38,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 09:13:38,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 09:13:38,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 09:13:38,680 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 09:13:38,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound10.c [2022-04-05 09:13:38,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9277d90c/99f31165312f4f08a7e9808bb6badc97/FLAG02af00a11 [2022-04-05 09:13:39,087 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 09:13:39,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound10.c [2022-04-05 09:13:39,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9277d90c/99f31165312f4f08a7e9808bb6badc97/FLAG02af00a11 [2022-04-05 09:13:39,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9277d90c/99f31165312f4f08a7e9808bb6badc97 [2022-04-05 09:13:39,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 09:13:39,102 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 09:13:39,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 09:13:39,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 09:13:39,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 09:13:39,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab7bc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39, skipping insertion in model container [2022-04-05 09:13:39,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 09:13:39,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 09:13:39,268 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/ps5-ll_valuebound10.c[458,471] [2022-04-05 09:13:39,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:13:39,290 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 09:13:39,298 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/ps5-ll_valuebound10.c[458,471] [2022-04-05 09:13:39,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:13:39,319 INFO L208 MainTranslator]: Completed translation [2022-04-05 09:13:39,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39 WrapperNode [2022-04-05 09:13:39,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 09:13:39,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 09:13:39,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 09:13:39,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 09:13:39,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 09:13:39,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 09:13:39,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 09:13:39,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 09:13:39,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:13:39,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:39,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 09:13:39,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 09:13:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 09:13:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 09:13:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 09:13:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 09:13:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 09:13:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 09:13:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 09:13:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 09:13:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 09:13:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 09:13:39,536 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 09:13:39,537 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 09:13:39,655 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 09:13:39,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 09:13:39,659 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 09:13:39,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:13:39 BoogieIcfgContainer [2022-04-05 09:13:39,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 09:13:39,661 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 09:13:39,661 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 09:13:39,676 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 09:13:39,678 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:13:39" (1/1) ... [2022-04-05 09:13:39,679 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 09:13:39,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:13:39 BasicIcfg [2022-04-05 09:13:39,702 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 09:13:39,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 09:13:39,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 09:13:39,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 09:13:39,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 09:13:39" (1/4) ... [2022-04-05 09:13:39,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74414ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:13:39, skipping insertion in model container [2022-04-05 09:13:39,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:13:39" (2/4) ... [2022-04-05 09:13:39,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74414ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:13:39, skipping insertion in model container [2022-04-05 09:13:39,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:13:39" (3/4) ... [2022-04-05 09:13:39,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74414ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:13:39, skipping insertion in model container [2022-04-05 09:13:39,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:13:39" (4/4) ... [2022-04-05 09:13:39,707 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound10.cqvasr [2022-04-05 09:13:39,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 09:13:39,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 09:13:39,755 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 09:13:39,760 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 09:13:39,760 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 09:13:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:13:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 09:13:39,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:39,778 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:39,778 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-04-05 09:13:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:39,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185890959] [2022-04-05 09:13:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:39,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:13:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 09:13:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:39,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 09:13:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:13:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185890959] [2022-04-05 09:13:39,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185890959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:13:39,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:13:39,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 09:13:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171745099] [2022-04-05 09:13:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:13:39,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 09:13:39,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 09:13:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:13:39,957 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 09:13:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:39,997 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-04-05 09:13:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 09:13:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 09:13:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:40,004 INFO L225 Difference]: With dead ends: 51 [2022-04-05 09:13:40,004 INFO L226 Difference]: Without dead ends: 24 [2022-04-05 09:13:40,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:13:40,009 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:40,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:13:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-05 09:13:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-05 09:13:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 09:13:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-05 09:13:40,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-04-05 09:13:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:40,070 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-05 09:13:40,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 09:13:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-05 09:13:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 09:13:40,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:40,071 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:40,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 09:13:40,072 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-04-05 09:13:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097170173] [2022-04-05 09:13:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:40,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:40,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630405971] [2022-04-05 09:13:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:40,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:40,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 09:13:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:40,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 09:13:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:13:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:13:40,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:13:40,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:40,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097170173] [2022-04-05 09:13:40,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:13:40,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630405971] [2022-04-05 09:13:40,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630405971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:13:40,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:13:40,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 09:13:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575446402] [2022-04-05 09:13:40,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:13:40,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:13:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:13:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:13:40,231 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 09:13:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:40,265 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-04-05 09:13:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:13:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-05 09:13:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:40,266 INFO L225 Difference]: With dead ends: 35 [2022-04-05 09:13:40,266 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 09:13:40,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 09:13:40,267 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:40,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:13:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 09:13:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 09:13:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:13:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-05 09:13:40,273 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-04-05 09:13:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:40,273 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-05 09:13:40,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 09:13:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-05 09:13:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 09:13:40,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:40,274 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:40,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 09:13:40,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:40,489 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-04-05 09:13:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:40,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839959331] [2022-04-05 09:13:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:40,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:40,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574083905] [2022-04-05 09:13:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:40,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:40,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:40,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:40,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 09:13:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 09:13:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:13:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:13:40,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:13:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:13:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839959331] [2022-04-05 09:13:44,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:13:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574083905] [2022-04-05 09:13:44,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574083905] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 09:13:44,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:13:44,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 09:13:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573380614] [2022-04-05 09:13:44,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:13:44,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:13:44,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:44,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:13:44,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-04-05 09:13:44,010 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 09:13:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:44,073 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-05 09:13:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:13:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-05 09:13:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:44,075 INFO L225 Difference]: With dead ends: 37 [2022-04-05 09:13:44,075 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 09:13:44,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-04-05 09:13:44,088 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:44,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:13:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 09:13:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-05 09:13:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:13:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-05 09:13:44,097 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-04-05 09:13:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:44,099 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-05 09:13:44,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 09:13:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-05 09:13:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 09:13:44,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:44,105 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:44,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 09:13:44,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 09:13:44,312 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-04-05 09:13:44,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:44,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203462628] [2022-04-05 09:13:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:44,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:44,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466500785] [2022-04-05 09:13:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:44,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:44,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:44,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 09:13:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:13:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 09:13:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:13:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 09:13:44,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:13:44,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:44,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203462628] [2022-04-05 09:13:44,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:13:44,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466500785] [2022-04-05 09:13:44,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466500785] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:13:44,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:13:44,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 09:13:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267933597] [2022-04-05 09:13:44,803 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:13:44,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 09:13:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 09:13:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 09:13:44,805 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 09:13:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:44,870 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-05 09:13:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 09:13:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-04-05 09:13:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:44,871 INFO L225 Difference]: With dead ends: 42 [2022-04-05 09:13:44,871 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 09:13:44,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:13:44,872 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:44,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:13:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 09:13:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-05 09:13:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:13:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-05 09:13:44,891 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-04-05 09:13:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:44,891 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-05 09:13:44,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 09:13:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-05 09:13:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 09:13:44,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:44,892 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:44,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 09:13:45,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:45,103 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-04-05 09:13:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:45,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037894945] [2022-04-05 09:13:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:45,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:45,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936628936] [2022-04-05 09:13:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:13:45,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:45,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:45,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 09:13:45,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:13:45,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:13:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 09:13:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:13:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 09:13:45,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:13:45,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037894945] [2022-04-05 09:13:45,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:13:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936628936] [2022-04-05 09:13:45,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936628936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:13:45,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:13:45,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 09:13:45,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274058593] [2022-04-05 09:13:45,642 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:13:45,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 09:13:45,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 09:13:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:13:45,643 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:13:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:45,712 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-04-05 09:13:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 09:13:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-04-05 09:13:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:45,713 INFO L225 Difference]: With dead ends: 45 [2022-04-05 09:13:45,713 INFO L226 Difference]: Without dead ends: 39 [2022-04-05 09:13:45,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:13:45,713 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:45,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 164 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:13:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-05 09:13:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-05 09:13:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 09:13:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-05 09:13:45,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-04-05 09:13:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:45,719 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-05 09:13:45,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:13:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-05 09:13:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 09:13:45,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:45,732 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:45,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 09:13:45,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:45,933 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-04-05 09:13:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:45,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730363365] [2022-04-05 09:13:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:45,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443189892] [2022-04-05 09:13:45,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:13:45,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:45,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:45,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:45,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 09:13:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 09:13:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:13:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 09:13:46,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:13:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-05 09:13:46,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:13:46,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:46,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730363365] [2022-04-05 09:13:46,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:13:46,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443189892] [2022-04-05 09:13:46,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443189892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:13:46,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:13:46,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 09:13:46,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987966843] [2022-04-05 09:13:46,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:13:46,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 09:13:46,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 09:13:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:13:46,401 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-05 09:13:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:46,518 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-05 09:13:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 09:13:46,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-04-05 09:13:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:46,519 INFO L225 Difference]: With dead ends: 48 [2022-04-05 09:13:46,519 INFO L226 Difference]: Without dead ends: 42 [2022-04-05 09:13:46,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:13:46,521 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:46,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:13:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-05 09:13:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-05 09:13:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 09:13:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-05 09:13:46,537 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-04-05 09:13:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:46,537 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-05 09:13:46,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-05 09:13:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-05 09:13:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 09:13:46,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:46,544 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:46,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-05 09:13:46,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:46,751 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-04-05 09:13:46,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262248681] [2022-04-05 09:13:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:46,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:46,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982759178] [2022-04-05 09:13:46,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:13:46,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:46,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:46,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:46,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 09:13:46,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:13:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:13:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 09:13:46,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:13:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 09:13:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:13:47,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:13:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262248681] [2022-04-05 09:13:47,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:13:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982759178] [2022-04-05 09:13:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982759178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:13:47,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:13:47,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-05 09:13:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412830585] [2022-04-05 09:13:47,104 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:13:47,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 09:13:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:13:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 09:13:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-05 09:13:47,105 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-05 09:13:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:13:47,221 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-04-05 09:13:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 09:13:47,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-04-05 09:13:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:13:47,222 INFO L225 Difference]: With dead ends: 51 [2022-04-05 09:13:47,222 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 09:13:47,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-05 09:13:47,223 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:13:47,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 234 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:13:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 09:13:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-05 09:13:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 09:13:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-05 09:13:47,228 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-04-05 09:13:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:13:47,229 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-05 09:13:47,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-05 09:13:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-05 09:13:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 09:13:47,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:13:47,229 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:13:47,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 09:13:47,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:47,439 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:13:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:13:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-04-05 09:13:47,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:13:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778492132] [2022-04-05 09:13:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:13:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:13:47,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:13:47,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780866536] [2022-04-05 09:13:47,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:13:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:13:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:13:47,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:13:47,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 09:14:02,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-05 09:14:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:14:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 09:14:02,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 09:14:02,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:02,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:02,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778492132] [2022-04-05 09:14:02,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:02,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780866536] [2022-04-05 09:14:02,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780866536] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:02,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:02,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-05 09:14:02,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966704456] [2022-04-05 09:14:02,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:02,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 09:14:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:02,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 09:14:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:14:02,693 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-05 09:14:02,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:02,835 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-05 09:14:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 09:14:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-04-05 09:14:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:02,836 INFO L225 Difference]: With dead ends: 54 [2022-04-05 09:14:02,836 INFO L226 Difference]: Without dead ends: 48 [2022-04-05 09:14:02,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-05 09:14:02,837 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:02,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 271 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:14:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-05 09:14:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-05 09:14:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 09:14:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-04-05 09:14:02,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-04-05 09:14:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:02,843 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-04-05 09:14:02,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-05 09:14:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-04-05 09:14:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 09:14:02,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:02,844 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:02,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 09:14:03,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:03,056 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-04-05 09:14:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195163038] [2022-04-05 09:14:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:03,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:03,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519496332] [2022-04-05 09:14:03,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 09:14:03,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:03,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:03,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:03,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 09:14:04,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 09:14:04,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:14:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 09:14:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 09:14:05,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:05,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:05,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195163038] [2022-04-05 09:14:05,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:05,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519496332] [2022-04-05 09:14:05,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519496332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:05,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:05,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-05 09:14:05,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269173818] [2022-04-05 09:14:05,385 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:05,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 09:14:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 09:14:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-04-05 09:14:05,386 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 09:14:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:05,541 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-05 09:14:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 09:14:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-04-05 09:14:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:05,542 INFO L225 Difference]: With dead ends: 57 [2022-04-05 09:14:05,542 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 09:14:05,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-05 09:14:05,543 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:05,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 302 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:14:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 09:14:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-05 09:14:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 09:14:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-04-05 09:14:05,549 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-04-05 09:14:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:05,549 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-04-05 09:14:05,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 09:14:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-04-05 09:14:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-05 09:14:05,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:05,550 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:05,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 09:14:05,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 09:14:05,756 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2022-04-05 09:14:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522221118] [2022-04-05 09:14:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:05,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580169763] [2022-04-05 09:14:05,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 09:14:05,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:05,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:05,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:05,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 09:14:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:14:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 09:14:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-05 09:14:07,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522221118] [2022-04-05 09:14:07,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580169763] [2022-04-05 09:14:07,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580169763] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:07,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:07,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-05 09:14:07,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788682380] [2022-04-05 09:14:07,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:07,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 09:14:07,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 09:14:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-05 09:14:07,250 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-04-05 09:14:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:07,419 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-05 09:14:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 09:14:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-04-05 09:14:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:07,420 INFO L225 Difference]: With dead ends: 60 [2022-04-05 09:14:07,420 INFO L226 Difference]: Without dead ends: 54 [2022-04-05 09:14:07,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-05 09:14:07,421 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:07,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 351 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:14:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-05 09:14:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-05 09:14:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 09:14:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-04-05 09:14:07,427 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-04-05 09:14:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:07,427 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-04-05 09:14:07,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-04-05 09:14:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-04-05 09:14:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-05 09:14:07,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:07,428 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:07,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 09:14:07,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 09:14:07,628 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2022-04-05 09:14:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:07,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39485308] [2022-04-05 09:14:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:07,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785420144] [2022-04-05 09:14:07,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:14:07,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:07,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:07,659 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:07,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 09:14:15,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:14:15,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:14:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 09:14:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-05 09:14:16,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:16,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39485308] [2022-04-05 09:14:16,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785420144] [2022-04-05 09:14:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785420144] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:16,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-05 09:14:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229798900] [2022-04-05 09:14:16,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:16,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 09:14:16,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 09:14:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-05 09:14:16,344 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-05 09:14:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:16,612 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-04-05 09:14:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 09:14:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-04-05 09:14:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:16,615 INFO L225 Difference]: With dead ends: 63 [2022-04-05 09:14:16,615 INFO L226 Difference]: Without dead ends: 57 [2022-04-05 09:14:16,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-05 09:14:16,616 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:16,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 394 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:14:16,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-05 09:14:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-05 09:14:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 09:14:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-04-05 09:14:16,626 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-04-05 09:14:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:16,626 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-04-05 09:14:16,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-05 09:14:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-04-05 09:14:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-05 09:14:16,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:16,627 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:16,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-05 09:14:16,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 09:14:16,834 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2022-04-05 09:14:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786440001] [2022-04-05 09:14:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:16,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:16,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937833434] [2022-04-05 09:14:16,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:14:16,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:16,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:16,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:16,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process