/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/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:52:26,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:52:26,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:52:26,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:52:26,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:52:26,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:52:26,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:52:26,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:52:26,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:52:26,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:52:26,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:52:26,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:52:26,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:52:26,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:52:26,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:52:26,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:52:26,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:52:26,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:52:26,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:52:26,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:52:26,542 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:52:26,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:52:26,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:52:26,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:52:26,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:52:26,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:52:26,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:52:26,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:52:26,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:52:26,557 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:52:26,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:52:26,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:52:26,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:52:26,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:52:26,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:52:26,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:52:26,577 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:52:26,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:52:26,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:52:26,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:52:26,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:52:26,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:52:26,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:52:26,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:52:26,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:52:26,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:52:26,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:52:26,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:52:26,580 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:52:26,580 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:52:26,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:52:26,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:52:26,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:52:26,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:52:26,755 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:52:26,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-04-06 11:52:26,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2255d6ee/1c4a0106c2174bcf8d1df20ebd473b48/FLAG7211426ee [2022-04-06 11:52:27,129 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:52:27,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-04-06 11:52:27,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2255d6ee/1c4a0106c2174bcf8d1df20ebd473b48/FLAG7211426ee [2022-04-06 11:52:27,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2255d6ee/1c4a0106c2174bcf8d1df20ebd473b48 [2022-04-06 11:52:27,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:52:27,144 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:52:27,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:52:27,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:52:27,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:52:27,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535bfe1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27, skipping insertion in model container [2022-04-06 11:52:27,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:52:27,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:52:27,304 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/egcd3-ll_valuebound100.c[490,503] [2022-04-06 11:52:27,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:52:27,343 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:52:27,351 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/egcd3-ll_valuebound100.c[490,503] [2022-04-06 11:52:27,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:52:27,377 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:52:27,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27 WrapperNode [2022-04-06 11:52:27,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:52:27,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:52:27,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:52:27,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:52:27,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:52:27,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:52:27,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:52:27,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:52:27,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:52:27,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:27,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 11:52:27,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 11:52:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:52:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:52:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:52:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:52:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:52:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:52:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:52:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:52:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:52:27,504 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:52:27,506 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:52:27,601 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:52:27,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:52:27,609 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 11:52:27,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:52:27 BoogieIcfgContainer [2022-04-06 11:52:27,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:52:27,611 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:52:27,611 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:52:27,611 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:52:27,616 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:52:27" (1/1) ... [2022-04-06 11:52:27,618 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:52:27,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:52:27 BasicIcfg [2022-04-06 11:52:27,630 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:52:27,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:52:27,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:52:27,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:52:27,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:52:27" (1/4) ... [2022-04-06 11:52:27,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66943203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:52:27, skipping insertion in model container [2022-04-06 11:52:27,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:52:27" (2/4) ... [2022-04-06 11:52:27,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66943203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:52:27, skipping insertion in model container [2022-04-06 11:52:27,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:52:27" (3/4) ... [2022-04-06 11:52:27,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66943203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:52:27, skipping insertion in model container [2022-04-06 11:52:27,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:52:27" (4/4) ... [2022-04-06 11:52:27,635 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.cqvasr [2022-04-06 11:52:27,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:52:27,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:52:27,680 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:52:27,690 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 11:52:27,690 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:52:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 11:52:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 11:52:27,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:27,706 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:27,706 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-06 11:52:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294590513] [2022-04-06 11:52:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:27,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:52:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:27,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:52:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:27,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 11:52:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 11:52:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:27,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 11:52:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:52:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:27,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294590513] [2022-04-06 11:52:27,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294590513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:52:27,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:52:27,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:52:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638521430] [2022-04-06 11:52:27,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:27,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:52:27,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:52:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:52:27,890 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:52:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:27,940 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-04-06 11:52:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:52:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 11:52:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:27,947 INFO L225 Difference]: With dead ends: 73 [2022-04-06 11:52:27,947 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 11:52:27,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:52:27,951 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:27,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 11:52:27,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 11:52:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 11:52:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 11:52:27,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-06 11:52:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:27,977 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 11:52:27,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:52:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 11:52:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 11:52:27,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:27,978 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:27,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:52:27,979 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-06 11:52:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:27,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054703481] [2022-04-06 11:52:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:27,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:27,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439523909] [2022-04-06 11:52:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:28,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:28,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:28,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:28,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:52:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:52:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:52:28,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:52:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054703481] [2022-04-06 11:52:28,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439523909] [2022-04-06 11:52:28,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439523909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:52:28,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:52:28,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 11:52:28,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694314522] [2022-04-06 11:52:28,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:28,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:52:28,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:52:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:52:28,195 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:52:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:28,278 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-06 11:52:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:52:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-06 11:52:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:28,282 INFO L225 Difference]: With dead ends: 54 [2022-04-06 11:52:28,282 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 11:52:28,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:52:28,284 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:28,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:52:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 11:52:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-06 11:52:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 11:52:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 11:52:28,310 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-06 11:52:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:28,310 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 11:52:28,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:52:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 11:52:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 11:52:28,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:28,311 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:28,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:28,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:28,512 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-06 11:52:28,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:28,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198119099] [2022-04-06 11:52:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:28,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:28,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:28,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189993662] [2022-04-06 11:52:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:28,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:28,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:28,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:52:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:28,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 11:52:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:52:28,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:52:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198119099] [2022-04-06 11:52:28,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189993662] [2022-04-06 11:52:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189993662] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:52:28,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:52:28,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 11:52:28,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998348410] [2022-04-06 11:52:28,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:28,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:52:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:52:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:52:28,910 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:52:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:28,951 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-04-06 11:52:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:52:28,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-06 11:52:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:28,952 INFO L225 Difference]: With dead ends: 53 [2022-04-06 11:52:28,952 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 11:52:28,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:52:28,953 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:28,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 11:52:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 11:52:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 11:52:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-06 11:52:28,961 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-06 11:52:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:28,961 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-06 11:52:28,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:52:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-06 11:52:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 11:52:28,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:28,962 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:28,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:29,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 11:52:29,176 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-06 11:52:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291056850] [2022-04-06 11:52:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:29,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158682900] [2022-04-06 11:52:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:29,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:29,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:29,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:52:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:52:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:52:29,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:52:29,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:29,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291056850] [2022-04-06 11:52:29,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:29,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158682900] [2022-04-06 11:52:29,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158682900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:52:29,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:52:29,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 11:52:29,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172155793] [2022-04-06 11:52:29,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:52:29,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:52:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:52:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:52:29,387 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:52:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:29,544 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-04-06 11:52:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:52:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 11:52:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:29,546 INFO L225 Difference]: With dead ends: 103 [2022-04-06 11:52:29,546 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 11:52:29,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:52:29,554 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:29,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 238 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:52:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 11:52:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-06 11:52:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 11:52:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-06 11:52:29,575 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-06 11:52:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:29,575 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-06 11:52:29,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:52:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-06 11:52:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 11:52:29,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:29,577 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:29,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:29,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:29,792 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-06 11:52:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:29,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909419861] [2022-04-06 11:52:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:29,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:29,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:29,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80905920] [2022-04-06 11:52:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:29,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:29,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:29,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:29,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:52:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:29,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 11:52:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:52:30,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:52:30,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909419861] [2022-04-06 11:52:30,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80905920] [2022-04-06 11:52:30,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80905920] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:52:30,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:52:30,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-06 11:52:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696080639] [2022-04-06 11:52:30,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:30,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:52:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:52:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:52:30,264 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 11:52:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:30,324 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-04-06 11:52:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:52:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-04-06 11:52:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:30,328 INFO L225 Difference]: With dead ends: 79 [2022-04-06 11:52:30,328 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 11:52:30,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:52:30,329 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:30,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 169 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 11:52:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-06 11:52:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 11:52:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-06 11:52:30,343 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-06 11:52:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:30,343 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-06 11:52:30,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 11:52:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-06 11:52:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 11:52:30,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:30,347 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:30,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:30,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:30,564 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-06 11:52:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:30,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819474402] [2022-04-06 11:52:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:30,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:30,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947819715] [2022-04-06 11:52:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:30,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:30,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:30,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:52:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 11:52:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:52:30,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:52:31,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:31,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819474402] [2022-04-06 11:52:31,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947819715] [2022-04-06 11:52:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947819715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:52:31,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:52:31,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-04-06 11:52:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843470144] [2022-04-06 11:52:31,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:52:31,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:52:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:52:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:52:31,023 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 11:52:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:31,392 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-04-06 11:52:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 11:52:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-04-06 11:52:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:31,393 INFO L225 Difference]: With dead ends: 118 [2022-04-06 11:52:31,393 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 11:52:31,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-04-06 11:52:31,394 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:31,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 255 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:52:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 11:52:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-04-06 11:52:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 11:52:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-04-06 11:52:31,406 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-04-06 11:52:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:31,411 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-04-06 11:52:31,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 11:52:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-04-06 11:52:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:52:31,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:31,416 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:31,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:31,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:31,632 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-06 11:52:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140130235] [2022-04-06 11:52:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:31,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804230556] [2022-04-06 11:52:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:31,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:31,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:31,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:31,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:52:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:52:31,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 11:52:31,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:52:31,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140130235] [2022-04-06 11:52:31,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:31,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804230556] [2022-04-06 11:52:31,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804230556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:52:31,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:52:31,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:52:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761638356] [2022-04-06 11:52:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:31,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:52:31,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:52:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:52:31,740 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:52:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:31,778 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-04-06 11:52:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:52:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-06 11:52:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:31,779 INFO L225 Difference]: With dead ends: 151 [2022-04-06 11:52:31,779 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 11:52:31,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:52:31,780 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:31,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 11:52:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-04-06 11:52:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 11:52:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-04-06 11:52:31,797 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-04-06 11:52:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:31,797 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-04-06 11:52:31,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:52:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-04-06 11:52:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:52:31,798 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:31,798 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:31,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:32,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:32,012 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-04-06 11:52:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:32,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760795151] [2022-04-06 11:52:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:32,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:32,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260354344] [2022-04-06 11:52:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:32,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:32,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:32,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:32,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:52:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 11:52:32,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:52:32,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:52:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760795151] [2022-04-06 11:52:32,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260354344] [2022-04-06 11:52:32,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260354344] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:52:32,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:52:32,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-04-06 11:52:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531017789] [2022-04-06 11:52:32,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:52:32,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 11:52:32,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 11:52:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-06 11:52:32,512 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 11:52:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:33,435 INFO L93 Difference]: Finished difference Result 194 states and 277 transitions. [2022-04-06 11:52:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 11:52:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-04-06 11:52:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:33,438 INFO L225 Difference]: With dead ends: 194 [2022-04-06 11:52:33,438 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 11:52:33,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-04-06 11:52:33,439 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:33,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 432 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-04-06 11:52:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 11:52:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 166. [2022-04-06 11:52:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 108 states have internal predecessors, (132), 53 states have call successors, (53), 9 states have call predecessors, (53), 8 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:52:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2022-04-06 11:52:33,460 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 47 [2022-04-06 11:52:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:33,461 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2022-04-06 11:52:33,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 11:52:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2022-04-06 11:52:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:52:33,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:33,461 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:33,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:33,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:33,675 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-04-06 11:52:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:33,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680164647] [2022-04-06 11:52:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:33,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:33,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599388825] [2022-04-06 11:52:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:52:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:33,690 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:33,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:52:33,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:52:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:52:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:52:33,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:52:33,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:52:33,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:33,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680164647] [2022-04-06 11:52:33,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:33,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599388825] [2022-04-06 11:52:33,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599388825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:52:33,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:52:33,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:52:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476385824] [2022-04-06 11:52:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:33,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:52:33,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:52:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:52:33,784 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:52:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:33,859 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2022-04-06 11:52:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:52:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-06 11:52:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:33,861 INFO L225 Difference]: With dead ends: 212 [2022-04-06 11:52:33,861 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 11:52:33,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:52:33,862 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:33,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 11:52:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-04-06 11:52:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 11:52:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-04-06 11:52:33,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 47 [2022-04-06 11:52:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:33,875 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-04-06 11:52:33,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:52:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-04-06 11:52:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 11:52:33,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:33,876 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:33,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:34,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 11:52:34,091 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-06 11:52:34,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550443774] [2022-04-06 11:52:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:34,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:34,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:34,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857523712] [2022-04-06 11:52:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:34,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:34,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:34,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:52:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:52:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 11:52:34,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:52:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550443774] [2022-04-06 11:52:34,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857523712] [2022-04-06 11:52:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857523712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:52:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:52:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:52:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932621372] [2022-04-06 11:52:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:34,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:52:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:52:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:52:34,203 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 11:52:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:34,248 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2022-04-06 11:52:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:52:34,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-06 11:52:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:34,250 INFO L225 Difference]: With dead ends: 163 [2022-04-06 11:52:34,250 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 11:52:34,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:52:34,250 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:34,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 11:52:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-04-06 11:52:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 85 states have internal predecessors, (90), 57 states have call successors, (57), 10 states have call predecessors, (57), 9 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 11:52:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2022-04-06 11:52:34,271 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 52 [2022-04-06 11:52:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:34,271 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2022-04-06 11:52:34,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 11:52:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2022-04-06 11:52:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 11:52:34,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:34,272 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:34,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:34,490 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 [2022-04-06 11:52:34,491 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-06 11:52:34,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:34,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178843756] [2022-04-06 11:52:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:34,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:34,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021992990] [2022-04-06 11:52:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:34,499 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) [2022-04-06 11:52:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:52:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 11:52:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:52:34,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:52:35,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178843756] [2022-04-06 11:52:35,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021992990] [2022-04-06 11:52:35,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021992990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:52:35,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:52:35,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 11:52:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384831338] [2022-04-06 11:52:35,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:52:35,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:52:35,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:52:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:52:35,213 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:52:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:40,091 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-04-06 11:52:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 11:52:40,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-04-06 11:52:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:40,094 INFO L225 Difference]: With dead ends: 331 [2022-04-06 11:52:40,094 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 11:52:40,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 11:52:40,095 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 148 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:40,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 373 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 11:52:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 11:52:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-04-06 11:52:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 11:52:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-04-06 11:52:40,141 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-04-06 11:52:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:40,142 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-04-06 11:52:40,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:52:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-04-06 11:52:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 11:52:40,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:40,142 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:40,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:40,355 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 [2022-04-06 11:52:40,355 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-04-06 11:52:40,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:40,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075987484] [2022-04-06 11:52:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:40,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:40,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538207065] [2022-04-06 11:52:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:40,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:40,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:40,364 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) [2022-04-06 11:52:40,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:52:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 11:52:40,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 11:52:40,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 11:52:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:40,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075987484] [2022-04-06 11:52:40,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:40,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538207065] [2022-04-06 11:52:40,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538207065] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:52:40,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:52:40,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 11:52:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386047479] [2022-04-06 11:52:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:40,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:52:40,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:40,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:52:40,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:52:40,659 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 11:52:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:40,740 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-04-06 11:52:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:52:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-04-06 11:52:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:40,741 INFO L225 Difference]: With dead ends: 256 [2022-04-06 11:52:40,741 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 11:52:40,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:52:40,742 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:40,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 11:52:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-04-06 11:52:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 11:52:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-04-06 11:52:40,785 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-04-06 11:52:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:40,785 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-04-06 11:52:40,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 11:52:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-04-06 11:52:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 11:52:40,786 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:40,786 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:40,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:40,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 11:52:40,995 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-04-06 11:52:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:40,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685981299] [2022-04-06 11:52:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:41,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196466773] [2022-04-06 11:52:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:41,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:41,004 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:41,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:52:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:52:41,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 11:52:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 11:52:41,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 11:52:41,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685981299] [2022-04-06 11:52:41,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196466773] [2022-04-06 11:52:41,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196466773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:52:41,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:52:41,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 11:52:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943221078] [2022-04-06 11:52:41,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:52:41,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 11:52:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 11:52:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:52:41,469 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:52:41,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:41,941 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2022-04-06 11:52:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:52:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-04-06 11:52:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:41,943 INFO L225 Difference]: With dead ends: 323 [2022-04-06 11:52:41,943 INFO L226 Difference]: Without dead ends: 321 [2022-04-06 11:52:41,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-06 11:52:41,943 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 73 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:41,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 270 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 11:52:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-06 11:52:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 258. [2022-04-06 11:52:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 159 states have internal predecessors, (181), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 11:52:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 357 transitions. [2022-04-06 11:52:41,988 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 357 transitions. Word has length 72 [2022-04-06 11:52:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:41,988 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 357 transitions. [2022-04-06 11:52:41,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:52:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 357 transitions. [2022-04-06 11:52:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 11:52:41,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:41,992 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:42,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 11:52:42,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 11:52:42,207 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-04-06 11:52:42,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:42,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357799905] [2022-04-06 11:52:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:42,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:42,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436073537] [2022-04-06 11:52:42,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:52:42,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:42,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:42,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:42,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:52:42,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:52:42,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:52:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 11:52:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:52:42,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:52:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357799905] [2022-04-06 11:52:42,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436073537] [2022-04-06 11:52:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436073537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:52:42,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:52:42,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:52:42,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156794756] [2022-04-06 11:52:42,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:52:42,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:52:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:52:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:52:42,359 INFO L87 Difference]: Start difference. First operand 258 states and 357 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 11:52:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:52:42,448 INFO L93 Difference]: Finished difference Result 444 states and 610 transitions. [2022-04-06 11:52:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:52:42,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-06 11:52:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:52:42,449 INFO L225 Difference]: With dead ends: 444 [2022-04-06 11:52:42,449 INFO L226 Difference]: Without dead ends: 266 [2022-04-06 11:52:42,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:52:42,451 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:52:42,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 109 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:52:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-04-06 11:52:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2022-04-06 11:52:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 161 states have internal predecessors, (187), 81 states have call successors, (81), 17 states have call predecessors, (81), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-06 11:52:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2022-04-06 11:52:42,520 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 77 [2022-04-06 11:52:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:52:42,520 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2022-04-06 11:52:42,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 11:52:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2022-04-06 11:52:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 11:52:42,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:52:42,521 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:52:42,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:52:42,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 11:52:42,727 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:52:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:52:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-04-06 11:52:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:52:42,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989334928] [2022-04-06 11:52:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:52:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:52:42,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:52:42,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441281917] [2022-04-06 11:52:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:52:42,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:52:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:52:42,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:52:42,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 11:52:42,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:52:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:52:42,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 11:52:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:52:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 11:52:43,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:52:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 11:52:44,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:52:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989334928] [2022-04-06 11:52:44,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:52:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441281917] [2022-04-06 11:52:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441281917] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:52:44,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:52:44,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-04-06 11:52:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860989402] [2022-04-06 11:52:44,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:52:44,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 11:52:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:52:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 11:52:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-04-06 11:52:44,508 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:52:58,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:01,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:53:13,459 INFO L93 Difference]: Finished difference Result 424 states and 583 transitions. [2022-04-06 11:53:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 11:53:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-04-06 11:53:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:53:13,461 INFO L225 Difference]: With dead ends: 424 [2022-04-06 11:53:13,461 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 11:53:13,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 11:53:13,462 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 258 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 434 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:53:13,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 501 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 1166 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2022-04-06 11:53:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 11:53:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2022-04-06 11:53:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 218 states have (on average 1.1926605504587156) internal successors, (260), 219 states have internal predecessors, (260), 119 states have call successors, (119), 22 states have call predecessors, (119), 21 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-04-06 11:53:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2022-04-06 11:53:13,537 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 496 transitions. Word has length 77 [2022-04-06 11:53:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:53:13,537 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 496 transitions. [2022-04-06 11:53:13,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:53:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 496 transitions. [2022-04-06 11:53:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 11:53:13,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:53:13,539 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:53:13,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 11:53:13,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:53:13,739 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:53:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:53:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-04-06 11:53:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:53:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871108425] [2022-04-06 11:53:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:53:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:53:13,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:53:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634278869] [2022-04-06 11:53:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:53:13,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:53:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:53:13,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:53:13,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 11:53:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:53:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 11:53:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:53:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 11:53:14,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:53:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 11:53:16,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:53:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871108425] [2022-04-06 11:53:16,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:53:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634278869] [2022-04-06 11:53:16,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634278869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:53:16,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:53:16,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 11:53:16,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623554707] [2022-04-06 11:53:16,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:53:16,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 11:53:16,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:53:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 11:53:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-04-06 11:53:16,807 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. Second operand has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 11:53:23,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:53:24,688 INFO L93 Difference]: Finished difference Result 470 states and 642 transitions. [2022-04-06 11:53:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 11:53:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 91 [2022-04-06 11:53:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:53:24,691 INFO L225 Difference]: With dead ends: 470 [2022-04-06 11:53:24,691 INFO L226 Difference]: Without dead ends: 466 [2022-04-06 11:53:24,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 11:53:24,692 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 140 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:53:24,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 324 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-04-06 11:53:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-04-06 11:53:24,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 370. [2022-04-06 11:53:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.192488262910798) internal successors, (254), 213 states have internal predecessors, (254), 130 states have call successors, (130), 27 states have call predecessors, (130), 26 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-06 11:53:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2022-04-06 11:53:24,801 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 91 [2022-04-06 11:53:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:53:24,801 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2022-04-06 11:53:24,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 11:53:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2022-04-06 11:53:24,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 11:53:24,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:53:24,804 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:53:24,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 11:53:25,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 11:53:25,020 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:53:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:53:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-04-06 11:53:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:53:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338331838] [2022-04-06 11:53:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:53:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:53:25,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:53:25,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833637177] [2022-04-06 11:53:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:53:25,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:53:25,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:53:25,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:53:25,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 11:53:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:53:25,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 11:53:25,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:53:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 11:53:25,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:53:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 11:53:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:53:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338331838] [2022-04-06 11:53:25,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:53:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833637177] [2022-04-06 11:53:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833637177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:53:25,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:53:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 11:53:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613871909] [2022-04-06 11:53:25,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:53:25,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:53:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:53:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:53:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:53:25,973 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 11:53:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:53:28,177 INFO L93 Difference]: Finished difference Result 897 states and 1392 transitions. [2022-04-06 11:53:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 11:53:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-04-06 11:53:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:53:28,181 INFO L225 Difference]: With dead ends: 897 [2022-04-06 11:53:28,181 INFO L226 Difference]: Without dead ends: 895 [2022-04-06 11:53:28,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-04-06 11:53:28,182 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 80 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:53:28,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 423 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 11:53:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-04-06 11:53:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 823. [2022-04-06 11:53:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 395 states have internal predecessors, (516), 398 states have call successors, (398), 30 states have call predecessors, (398), 29 states have return successors, (397), 397 states have call predecessors, (397), 397 states have call successors, (397) [2022-04-06 11:53:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1311 transitions. [2022-04-06 11:53:28,475 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1311 transitions. Word has length 94 [2022-04-06 11:53:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:53:28,476 INFO L478 AbstractCegarLoop]: Abstraction has 823 states and 1311 transitions. [2022-04-06 11:53:28,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 11:53:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1311 transitions. [2022-04-06 11:53:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 11:53:28,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:53:28,477 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:53:28,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 11:53:28,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 11:53:28,693 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:53:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:53:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-04-06 11:53:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:53:28,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213280565] [2022-04-06 11:53:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:53:28,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:53:28,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:53:28,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786281645] [2022-04-06 11:53:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:53:28,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:53:28,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:53:28,724 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:53:28,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 11:53:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:53:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 11:53:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:53:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 11:53:29,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:53:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 11:53:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:53:30,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213280565] [2022-04-06 11:53:30,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:53:30,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786281645] [2022-04-06 11:53:30,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786281645] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:53:30,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:53:30,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 11:53:30,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215404586] [2022-04-06 11:53:30,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:53:30,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 11:53:30,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:53:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 11:53:30,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-06 11:53:30,049 INFO L87 Difference]: Start difference. First operand 823 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 11:53:35,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:36,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:38,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:40,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:53:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:53:44,203 INFO L93 Difference]: Finished difference Result 929 states and 1490 transitions. [2022-04-06 11:53:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 11:53:44,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-04-06 11:53:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:53:44,204 INFO L225 Difference]: With dead ends: 929 [2022-04-06 11:53:44,204 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 11:53:44,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 165 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 11:53:44,208 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 223 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:53:44,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 280 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 658 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-04-06 11:53:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 11:53:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 11:53:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 11:53:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 11:53:44,210 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-04-06 11:53:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:53:44,210 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 11:53:44,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 11:53:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 11:53:44,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 11:53:44,214 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:53:44,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 11:53:44,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 11:53:44,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 11:53:49,887 WARN L232 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 464 DAG size of output: 472 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:53:55,202 WARN L232 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 468 DAG size of output: 468 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:54:05,066 WARN L232 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 409 DAG size of output: 404 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:54:10,267 WARN L232 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 469 DAG size of output: 471 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:54:17,389 WARN L232 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 485 DAG size of output: 476 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:54:24,507 WARN L232 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 485 DAG size of output: 476 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:54:32,043 WARN L232 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 166 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:55:16,971 WARN L232 SmtUtils]: Spent 44.92s on a formula simplification. DAG size of input: 392 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:56:07,970 WARN L232 SmtUtils]: Spent 50.98s on a formula simplification. DAG size of input: 388 DAG size of output: 58 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:56:27,181 WARN L232 SmtUtils]: Spent 19.20s on a formula simplification. DAG size of input: 333 DAG size of output: 65 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:57:32,893 WARN L232 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 391 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:58:59,033 WARN L232 SmtUtils]: Spent 1.44m on a formula simplification. DAG size of input: 401 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 12:00:06,642 WARN L232 SmtUtils]: Spent 1.13m on a formula simplification. DAG size of input: 401 DAG size of output: 60 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 12:00:06,646 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 12:00:06,646 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 12:00:06,646 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 12:00:06,646 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 12:00:06,646 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 12:00:06,646 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 12:00:06,646 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-04-06 12:00:06,647 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-04-06 12:00:06,647 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 100)) [2022-04-06 12:00:06,647 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 100)) [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse3 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 .cse3)) (.cse1 (<= main_~y~0 100)) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~s~0 1) .cse0 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) .cse1 (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) (= main_~p~0 1)) (and (< main_~b~0 main_~a~0) (or (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (not (<= (* main_~b~0 3) main_~c~0)) (<= (* main_~b~0 4) main_~c~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 (or (= .cse3 (+ (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0))) (<= main_~b~0 main_~c~0)) .cse1 .cse2)))) [2022-04-06 12:00:06,647 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (* main_~q~0 main_~x~0)) (.cse1 (* main_~y~0 main_~s~0))) (let ((.cse2 (= main_~b~0 (+ .cse0 .cse1)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (= (+ .cse0 main_~a~0 .cse1) (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (or .cse2 (= main_~b~0 0)) (<= main_~y~0 100) (or .cse2 (<= main_~b~0 main_~c~0)) (<= 1 main_~y~0)))) [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-04-06 12:00:06,647 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse10 (* main_~y~0 main_~r~0)) (.cse11 (* main_~p~0 main_~x~0)) (.cse18 (* main_~q~0 main_~x~0)) (.cse17 (* main_~y~0 main_~s~0))) (let ((.cse6 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse8 (* main_~k~0 main_~y~0 main_~s~0)) (.cse9 (* main_~q~0 main_~k~0 main_~x~0)) (.cse0 (= main_~b~0 (+ .cse18 .cse17))) (.cse1 (<= 1 main_~x~0)) (.cse2 (= main_~k~0 0)) (.cse7 (= main_~s~0 1)) (.cse3 (= main_~a~0 (+ .cse10 .cse11))) (.cse12 (<= 1 main_~a~0)) (.cse13 (= main_~b~0 main_~y~0)) (.cse4 (<= main_~y~0 100)) (.cse14 (= main_~q~0 0)) (.cse5 (<= 1 main_~y~0)) (.cse15 (= main_~a~0 main_~x~0)) (.cse16 (= main_~p~0 1))) (or (and (= main_~c~0 main_~a~0) .cse0 .cse1 .cse2 .cse3 (< main_~b~0 main_~c~0) .cse4 .cse5) (and .cse6 .cse7 .cse3 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse8 main_~c~0 .cse9 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse10 main_~v~0 .cse11)) .cse12 .cse13 .cse4 .cse14 .cse5 .cse15 .cse16) (and (< main_~b~0 main_~a~0) .cse6 (= (+ (* 2 .cse17) (* .cse18 2) .cse8 main_~c~0 .cse9) (+ .cse10 .cse11 (* main_~b~0 2))) .cse0 .cse1 .cse3 .cse4 .cse5) (and .cse2 .cse7 .cse3 .cse12 .cse13 .cse4 .cse14 .cse5 .cse15 (= main_~c~0 main_~x~0) .cse16)))) [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= main_~y~0 100)) (.cse3 (<= 1 main_~y~0))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) .cse2 (= main_~q~0 0) .cse3 (= main_~a~0 main_~x~0) (= main_~p~0 1))))) [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse6 (= main_~a~0 (+ .cse4 .cse5))) (.cse2 (* main_~k~0 main_~y~0 main_~s~0)) (.cse3 (* main_~q~0 main_~k~0 main_~x~0)) (.cse7 (<= main_~y~0 100)) (.cse8 (<= 1 main_~y~0))) (or (let ((.cse1 (* main_~q~0 main_~x~0)) (.cse0 (* main_~y~0 main_~s~0))) (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= (+ (* 2 .cse0) (* .cse1 2) .cse2 main_~c~0 .cse3) (+ .cse4 .cse5 (* main_~b~0 2))) (= main_~b~0 (+ .cse1 .cse0)) (<= 1 main_~x~0) .cse6 .cse7 .cse8)) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse6 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse2 main_~c~0 .cse3 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5)) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) .cse7 (= main_~q~0 0) .cse8 (= main_~a~0 main_~x~0) (= main_~p~0 1))))) [2022-04-06 12:00:06,648 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse5 (* main_~y~0 main_~r~0)) (.cse6 (* main_~p~0 main_~x~0))) (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ .cse5 .cse6))) (.cse2 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse5 main_~v~0 .cse6))) (.cse3 (<= main_~y~0 100)) (.cse4 (<= 1 main_~y~0))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse0 .cse1 .cse2 .cse3 .cse4) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) .cse0 (= main_~s~0 1) .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 (= main_~q~0 0) (<= main_~x~0 main_~a~0) .cse4 (= main_~p~0 1))))) [2022-04-06 12:00:06,648 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse5 (* main_~y~0 main_~r~0)) (.cse6 (* main_~p~0 main_~x~0))) (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ .cse5 .cse6))) (.cse2 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse5 main_~v~0 .cse6))) (.cse3 (<= main_~y~0 100)) (.cse4 (<= 1 main_~y~0))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse0 .cse1 .cse2 .cse3 .cse4) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) .cse0 (= main_~s~0 1) .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 (= main_~q~0 0) (<= main_~x~0 main_~a~0) .cse4 (= main_~p~0 1))))) [2022-04-06 12:00:06,648 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse2 (* main_~k~0 main_~y~0 main_~s~0)) (.cse3 (* main_~q~0 main_~k~0 main_~x~0)) (.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ .cse4 .cse5))) (.cse6 (<= main_~y~0 100)) (.cse7 (<= 1 main_~y~0))) (or (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) .cse0 (= main_~s~0 1) .cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse2 main_~c~0 .cse3 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5)) (= main_~b~0 main_~y~0) .cse6 (= main_~q~0 0) (<= main_~x~0 main_~a~0) .cse7 (= main_~p~0 1)) (let ((.cse9 (* main_~q~0 main_~x~0)) (.cse8 (* main_~y~0 main_~s~0))) (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= (+ (* 2 .cse8) (* .cse9 2) .cse2 main_~c~0 .cse3) (+ .cse4 .cse5 (* main_~b~0 2))) (= main_~b~0 (+ .cse9 .cse8)) .cse0 .cse1 .cse6 .cse7))))) [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-04-06 12:00:06,648 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-04-06 12:00:06,649 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-04-06 12:00:06,649 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-04-06 12:00:06,649 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-04-06 12:00:06,651 INFO L719 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:00:06,652 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 12:00:06,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 12:00:06 BasicIcfg [2022-04-06 12:00:06,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 12:00:06,692 INFO L158 Benchmark]: Toolchain (without parser) took 459547.40ms. Allocated memory was 201.3MB in the beginning and 463.5MB in the end (delta: 262.1MB). Free memory was 148.7MB in the beginning and 270.2MB in the end (delta: -121.5MB). Peak memory consumption was 256.9MB. Max. memory is 8.0GB. [2022-04-06 12:00:06,692 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 201.3MB. Free memory was 164.9MB in the beginning and 164.8MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 12:00:06,692 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.47ms. Allocated memory is still 201.3MB. Free memory was 148.6MB in the beginning and 176.3MB in the end (delta: -27.7MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. [2022-04-06 12:00:06,692 INFO L158 Benchmark]: Boogie Preprocessor took 23.15ms. Allocated memory is still 201.3MB. Free memory was 176.3MB in the beginning and 174.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 12:00:06,692 INFO L158 Benchmark]: RCFGBuilder took 207.94ms. Allocated memory is still 201.3MB. Free memory was 174.7MB in the beginning and 163.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 12:00:06,692 INFO L158 Benchmark]: IcfgTransformer took 19.84ms. Allocated memory is still 201.3MB. Free memory was 163.2MB in the beginning and 161.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 12:00:06,693 INFO L158 Benchmark]: TraceAbstraction took 459059.71ms. Allocated memory was 201.3MB in the beginning and 463.5MB in the end (delta: 262.1MB). Free memory was 161.1MB in the beginning and 270.2MB in the end (delta: -109.2MB). Peak memory consumption was 269.4MB. Max. memory is 8.0GB. [2022-04-06 12:00:06,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 201.3MB. Free memory was 164.9MB in the beginning and 164.8MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 232.47ms. Allocated memory is still 201.3MB. Free memory was 148.6MB in the beginning and 176.3MB in the end (delta: -27.7MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.15ms. Allocated memory is still 201.3MB. Free memory was 176.3MB in the beginning and 174.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 207.94ms. Allocated memory is still 201.3MB. Free memory was 174.7MB in the beginning and 163.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.84ms. Allocated memory is still 201.3MB. Free memory was 163.2MB in the beginning and 161.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 459059.71ms. Allocated memory was 201.3MB in the beginning and 463.5MB in the end (delta: 262.1MB). Free memory was 161.1MB in the beginning and 270.2MB in the end (delta: -109.2MB). Peak memory consumption was 269.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 459.0s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 60.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 382.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1254 SdHoareTripleChecker+Valid, 34.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1190 mSDsluCounter, 4143 SdHoareTripleChecker+Invalid, 33.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 84 IncrementalHoareTripleChecker+Unchecked, 3224 mSDsCounter, 1662 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6083 IncrementalHoareTripleChecker+Invalid, 7831 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1662 mSolverCounterUnsat, 919 mSDtfsCounter, 6083 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1972 GetRequests, 1626 SyntacticMatches, 18 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=823occurred in iteration=17, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 500 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 565 PreInvPairs, 1178 NumberOfFragments, 1072 HoareAnnotationTreeSize, 565 FomulaSimplifications, 410968 FormulaSimplificationTreeSizeReduction, 40.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 766482 FormulaSimplificationTreeSizeReductionInter, 342.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1806 ConstructedInterpolants, 3 QuantifiedInterpolants, 9373 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2865 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2231/2489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((b < a && v == d * b) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && y <= 100) && 1 <= y) || ((((((((((a == c + b * k && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && y <= 100) && q == 0) && 1 <= y) && a == x) && p == 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((s == 1 && a == y * r + p * x) && 1 <= a) && b == y) && y <= 100) && q == 0) && 1 <= y) && a == x) && p == 1) || (((((((b < a && ((a == c + b * k || !(b * 3 <= c)) || b * 4 <= c)) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && y <= 100) && 1 <= y) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((c == a && b == q * x + y * s) && 1 <= x) && k == 0) && a == y * r + p * x) && b < c) && y <= 100) && 1 <= y) || ((((((((((v == d * b && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && y <= 100) && q == 0) && 1 <= y) && a == x) && p == 1)) || (((((((b < a && v == d * b) && 2 * (y * s) + q * x * 2 + k * y * s + c + q * k * x == y * r + p * x + b * 2) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && y <= 100) && 1 <= y)) || ((((((((((k == 0 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && y <= 100) && q == 0) && 1 <= y) && a == x) && c == x) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-04-06 12:00:06,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...