/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:55:27,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:55:27,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:55:27,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:55:27,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:55:27,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:55:27,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:55:27,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:55:27,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:55:27,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:55:27,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:55:27,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:55:27,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:55:27,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:55:27,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:55:27,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:55:27,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:55:27,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:55:27,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:55:27,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:55:27,532 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:55:27,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:55:27,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:55:27,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:55:27,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:55:27,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:55:27,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:55:27,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:55:27,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:55:27,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:55:27,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:55:27,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:55:27,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:55:27,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:55:27,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:55:27,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:55:27,572 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:55:27,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:55:27,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:55:27,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:55:27,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:55:27,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:55:27,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:55:27,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:55:27,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:55:27,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:55:27,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:55:27,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:55:27,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:55:27,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:55:27,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:55:27,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:55:27,577 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:55:27,578 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:55:27,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:55:27,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:55:27,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:55:27,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:55:27,840 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:55:27,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2022-04-05 07:55:27,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868061f2c/21704bd80715429c9702e29641c93ec7/FLAGb59387400 [2022-04-05 07:55:28,281 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:55:28,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2022-04-05 07:55:28,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868061f2c/21704bd80715429c9702e29641c93ec7/FLAGb59387400 [2022-04-05 07:55:28,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868061f2c/21704bd80715429c9702e29641c93ec7 [2022-04-05 07:55:28,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:55:28,691 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:55:28,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:55:28,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:55:28,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:55:28,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7144ce87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28, skipping insertion in model container [2022-04-05 07:55:28,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:55:28,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:55:28,850 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] [2022-04-05 07:55:28,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:55:28,869 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:55:28,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] [2022-04-05 07:55:28,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:55:28,894 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:55:28,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28 WrapperNode [2022-04-05 07:55:28,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:55:28,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:55:28,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:55:28,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:55:28,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:55:28,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:55:28,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:55:28,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:55:28,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (1/1) ... [2022-04-05 07:55:28,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:55:28,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:28,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 07:55:28,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 07:55:28,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:55:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:55:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:55:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:55:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:55:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:55:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:55:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:55:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:55:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:55:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:55:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:55:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:55:29,045 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:55:29,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:55:29,209 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:55:29,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:55:29,215 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 07:55:29,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:55:29 BoogieIcfgContainer [2022-04-05 07:55:29,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:55:29,217 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:55:29,217 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:55:29,224 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:55:29,236 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:55:29" (1/1) ... [2022-04-05 07:55:29,237 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:55:29,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:55:29 BasicIcfg [2022-04-05 07:55:29,264 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:55:29,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:55:29,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:55:29,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:55:29,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:55:28" (1/4) ... [2022-04-05 07:55:29,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54617d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:55:29, skipping insertion in model container [2022-04-05 07:55:29,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:55:28" (2/4) ... [2022-04-05 07:55:29,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54617d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:55:29, skipping insertion in model container [2022-04-05 07:55:29,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:55:29" (3/4) ... [2022-04-05 07:55:29,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54617d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:55:29, skipping insertion in model container [2022-04-05 07:55:29,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:55:29" (4/4) ... [2022-04-05 07:55:29,269 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.cqvasr [2022-04-05 07:55:29,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:55:29,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:55:29,329 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:55:29,339 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 07:55:29,339 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:55:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 07:55:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 07:55:29,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:29,367 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:29,367 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-04-05 07:55:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:29,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642056335] [2022-04-05 07:55:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:29,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:29,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:55:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:55:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:55:29,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642056335] [2022-04-05 07:55:29,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642056335] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:29,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:29,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:55:29,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206578354] [2022-04-05 07:55:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:29,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:55:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:55:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:55:29,621 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:55:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:29,725 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-04-05 07:55:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:55:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 07:55:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:29,736 INFO L225 Difference]: With dead ends: 66 [2022-04-05 07:55:29,736 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 07:55:29,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:55:29,742 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:29,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 07:55:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-05 07:55:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 07:55:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-05 07:55:29,782 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-05 07:55:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:29,783 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-05 07:55:29,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:55:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-05 07:55:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 07:55:29,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:29,785 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:29,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:55:29,785 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-04-05 07:55:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:29,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624368546] [2022-04-05 07:55:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:29,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:55:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:55:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:55:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624368546] [2022-04-05 07:55:29,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624368546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:29,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:29,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:55:29,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926687499] [2022-04-05 07:55:29,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:29,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:55:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:29,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:55:29,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:55:29,928 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:55:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:30,106 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-05 07:55:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 07:55:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 07:55:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:30,111 INFO L225 Difference]: With dead ends: 47 [2022-04-05 07:55:30,111 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 07:55:30,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:55:30,119 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:30,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 07:55:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-05 07:55:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 07:55:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-05 07:55:30,138 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-05 07:55:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:30,138 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-05 07:55:30,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:55:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-05 07:55:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 07:55:30,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:30,140 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:30,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 07:55:30,140 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-04-05 07:55:30,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:30,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258518372] [2022-04-05 07:55:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:30,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:30,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79876435] [2022-04-05 07:55:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:30,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:30,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:30,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:55:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:55:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:55:30,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:55:30,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:30,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258518372] [2022-04-05 07:55:30,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79876435] [2022-04-05 07:55:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79876435] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:30,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:30,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 07:55:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431521852] [2022-04-05 07:55:30,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:30,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 07:55:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 07:55:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 07:55:30,276 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:55:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:30,286 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-04-05 07:55:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 07:55:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-05 07:55:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:30,288 INFO L225 Difference]: With dead ends: 52 [2022-04-05 07:55:30,288 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 07:55:30,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 07:55:30,289 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:30,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:55:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 07:55:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-05 07:55:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 07:55:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-05 07:55:30,295 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-05 07:55:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:30,295 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-05 07:55:30,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:55:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-05 07:55:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 07:55:30,296 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:30,296 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:30,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:30,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:30,515 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-04-05 07:55:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:30,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074589807] [2022-04-05 07:55:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:55:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:55:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:30,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 07:55:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:55:30,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074589807] [2022-04-05 07:55:30,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074589807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:30,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:30,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:55:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111508875] [2022-04-05 07:55:30,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:30,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:55:30,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:55:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:55:30,622 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:55:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:30,765 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 07:55:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 07:55:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 07:55:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:30,766 INFO L225 Difference]: With dead ends: 52 [2022-04-05 07:55:30,767 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 07:55:30,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:55:30,775 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:30,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 07:55:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-05 07:55:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 07:55:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-05 07:55:30,787 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-05 07:55:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:30,787 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-05 07:55:30,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:55:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-05 07:55:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 07:55:30,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:30,788 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:30,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 07:55:30,789 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-04-05 07:55:30,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:30,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064744689] [2022-04-05 07:55:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:30,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:30,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:30,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731895105] [2022-04-05 07:55:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:30,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:30,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:55:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:55:30,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:55:30,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:55:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064744689] [2022-04-05 07:55:30,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731895105] [2022-04-05 07:55:30,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731895105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:30,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:30,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:55:30,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558326062] [2022-04-05 07:55:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:30,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:55:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:55:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:55:30,994 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 07:55:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:31,065 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-04-05 07:55:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:55:31,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 07:55:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:31,068 INFO L225 Difference]: With dead ends: 71 [2022-04-05 07:55:31,068 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 07:55:31,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:55:31,069 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:31,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:55:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 07:55:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-05 07:55:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 07:55:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-04-05 07:55:31,091 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-04-05 07:55:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:31,091 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-04-05 07:55:31,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 07:55:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-04-05 07:55:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:55:31,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:31,093 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:31,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:31,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:31,312 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-04-05 07:55:31,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:31,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669807337] [2022-04-05 07:55:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:31,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:31,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055765971] [2022-04-05 07:55:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:31,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:31,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:31,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:31,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:55:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:31,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:55:31,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:55:31,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:55:31,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669807337] [2022-04-05 07:55:31,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:31,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055765971] [2022-04-05 07:55:31,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055765971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:31,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:31,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:55:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419479280] [2022-04-05 07:55:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:31,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:55:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:55:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:55:31,454 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 07:55:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:31,481 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-04-05 07:55:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:55:31,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-05 07:55:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:31,483 INFO L225 Difference]: With dead ends: 76 [2022-04-05 07:55:31,483 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 07:55:31,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:55:31,484 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:31,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:55:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 07:55:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-05 07:55:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 07:55:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-04-05 07:55:31,492 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-04-05 07:55:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:31,493 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-04-05 07:55:31,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 07:55:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-04-05 07:55:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:55:31,494 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:31,494 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:31,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:31,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:31,708 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-04-05 07:55:31,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:31,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783130699] [2022-04-05 07:55:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:31,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:31,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99370358] [2022-04-05 07:55:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:31,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:31,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:31,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:55:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:55:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:55:31,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:55:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783130699] [2022-04-05 07:55:31,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99370358] [2022-04-05 07:55:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99370358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:55:31,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:55:31,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:55:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500789179] [2022-04-05 07:55:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:31,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:55:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:55:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:55:31,954 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:55:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:32,040 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-04-05 07:55:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:55:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 07:55:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:32,041 INFO L225 Difference]: With dead ends: 74 [2022-04-05 07:55:32,041 INFO L226 Difference]: Without dead ends: 58 [2022-04-05 07:55:32,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:55:32,042 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:32,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-05 07:55:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-05 07:55:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 07:55:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-04-05 07:55:32,049 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-04-05 07:55:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:32,049 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-04-05 07:55:32,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:55:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-04-05 07:55:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 07:55:32,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:32,050 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:32,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:32,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:32,267 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-04-05 07:55:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:32,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313919992] [2022-04-05 07:55:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:32,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:32,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:32,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960892183] [2022-04-05 07:55:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:32,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:32,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:55:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:55:32,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:55:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:55:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:55:32,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:32,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313919992] [2022-04-05 07:55:32,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:32,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960892183] [2022-04-05 07:55:32,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960892183] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:55:32,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:55:32,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 07:55:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744872633] [2022-04-05 07:55:32,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:55:32,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 07:55:32,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 07:55:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:55:32,500 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 07:55:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:32,593 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-04-05 07:55:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:55:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-04-05 07:55:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:32,595 INFO L225 Difference]: With dead ends: 123 [2022-04-05 07:55:32,595 INFO L226 Difference]: Without dead ends: 109 [2022-04-05 07:55:32,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:55:32,596 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:32,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-05 07:55:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-04-05 07:55:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 07:55:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-04-05 07:55:32,609 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-04-05 07:55:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:32,609 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-04-05 07:55:32,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 07:55:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-04-05 07:55:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 07:55:32,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:32,610 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:32,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:32,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:32,834 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-04-05 07:55:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859413479] [2022-04-05 07:55:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:32,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:32,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574379646] [2022-04-05 07:55:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:32,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:32,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:32,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:55:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:32,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 07:55:32,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 07:55:33,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:55:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:55:33,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859413479] [2022-04-05 07:55:33,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574379646] [2022-04-05 07:55:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574379646] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:55:33,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:55:33,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 07:55:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786621452] [2022-04-05 07:55:33,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:55:33,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:55:33,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:55:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:55:33,274 INFO L87 Difference]: Start difference. First operand 103 states and 120 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), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:55:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:33,367 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-04-05 07:55:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:55:33,367 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), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-04-05 07:55:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:33,368 INFO L225 Difference]: With dead ends: 120 [2022-04-05 07:55:33,368 INFO L226 Difference]: Without dead ends: 118 [2022-04-05 07:55:33,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:55:33,369 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:33,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-05 07:55:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-04-05 07:55:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 07:55:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-04-05 07:55:33,389 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-04-05 07:55:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:33,391 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-04-05 07:55:33,391 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), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:55:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-04-05 07:55:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 07:55:33,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:33,392 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:33,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:33,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:33,593 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:33,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-04-05 07:55:33,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:33,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77267921] [2022-04-05 07:55:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:33,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087174208] [2022-04-05 07:55:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:33,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:33,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:33,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:55:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:33,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:55:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:55:33,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:55:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:55:33,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:33,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77267921] [2022-04-05 07:55:33,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:33,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087174208] [2022-04-05 07:55:33,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087174208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:55:33,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:55:33,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 07:55:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669950007] [2022-04-05 07:55:33,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:55:33,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:55:33,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:55:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:55:33,893 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-05 07:55:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:34,049 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-04-05 07:55:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 07:55:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-04-05 07:55:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:34,054 INFO L225 Difference]: With dead ends: 207 [2022-04-05 07:55:34,054 INFO L226 Difference]: Without dead ends: 193 [2022-04-05 07:55:34,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-04-05 07:55:34,055 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:34,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 224 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:55:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-05 07:55:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-04-05 07:55:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-05 07:55:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-04-05 07:55:34,078 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-04-05 07:55:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:34,078 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-04-05 07:55:34,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-05 07:55:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-04-05 07:55:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 07:55:34,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:34,079 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:55:34,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:34,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:34,302 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-04-05 07:55:34,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:34,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501193752] [2022-04-05 07:55:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:34,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:34,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805553222] [2022-04-05 07:55:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:34,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:34,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:34,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:55:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 07:55:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:55:34,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:55:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:55:34,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:55:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501193752] [2022-04-05 07:55:34,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:55:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805553222] [2022-04-05 07:55:34,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805553222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:55:34,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:55:34,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 07:55:34,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810869703] [2022-04-05 07:55:34,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:55:34,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:55:34,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:55:34,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:55:34,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:55:34,999 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 07:55:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:55:35,270 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2022-04-05 07:55:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:55:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-04-05 07:55:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:55:35,273 INFO L225 Difference]: With dead ends: 268 [2022-04-05 07:55:35,273 INFO L226 Difference]: Without dead ends: 264 [2022-04-05 07:55:35,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-04-05 07:55:35,273 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:55:35,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 231 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:55:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-05 07:55:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-04-05 07:55:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-05 07:55:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-04-05 07:55:35,294 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-04-05 07:55:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:55:35,294 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-04-05 07:55:35,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 07:55:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-04-05 07:55:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 07:55:35,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:55:35,296 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-04-05 07:55:35,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 07:55:35,517 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,SelfDestructingSolverStorable10 [2022-04-05 07:55:35,518 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:55:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:55:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-04-05 07:55:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:55:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766669195] [2022-04-05 07:55:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:35,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:55:35,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:55:35,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203342722] [2022-04-05 07:55:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:55:35,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:55:35,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:55:35,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:55:35,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:55:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:55:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 07:55:35,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:55:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-05 07:55:36,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:56:05,016 WARN L232 SmtUtils]: Spent 15.78s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:57:25,492 WARN L232 SmtUtils]: Spent 23.58s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:58:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-05 07:58:46,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:58:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766669195] [2022-04-05 07:58:46,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:58:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203342722] [2022-04-05 07:58:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203342722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:58:46,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:58:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-05 07:58:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839382681] [2022-04-05 07:58:46,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:58:46,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 07:58:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:58:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 07:58:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-04-05 07:58:46,864 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-05 07:58:49,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:58:51,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:58:54,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:58:56,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:58:58,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:59:00,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:59:02,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:59:15,675 WARN L232 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:59:18,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:59:23,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:59:47,329 WARN L232 SmtUtils]: Spent 22.20s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:59:54,416 WARN L232 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 08:00:01,421 WARN L232 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 08:00:05,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:00:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:00:05,992 INFO L93 Difference]: Finished difference Result 369 states and 471 transitions. [2022-04-05 08:00:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 08:00:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-04-05 08:00:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:00:05,995 INFO L225 Difference]: With dead ends: 369 [2022-04-05 08:00:05,995 INFO L226 Difference]: Without dead ends: 293 [2022-04-05 08:00:05,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 90.6s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2022-04-05 08:00:05,996 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 122 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time [2022-04-05 08:00:05,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 248 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 512 Invalid, 9 Unknown, 0 Unchecked, 30.4s Time] [2022-04-05 08:00:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-05 08:00:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-04-05 08:00:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-05 08:00:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-04-05 08:00:06,027 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-04-05 08:00:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:00:06,027 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-04-05 08:00:06,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-05 08:00:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-04-05 08:00:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 08:00:06,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:00:06,029 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 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] [2022-04-05 08:00:06,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 08:00:06,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:00:06,230 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:00:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:00:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-04-05 08:00:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:00:06,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242306245] [2022-04-05 08:00:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:06,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:00:06,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:00:06,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278301939] [2022-04-05 08:00:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:06,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:00:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:00:06,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:00:06,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 08:00:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:00:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 08:00:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:00:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-05 08:00:06,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:00:09,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:00:09,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242306245] [2022-04-05 08:00:09,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:00:09,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278301939] [2022-04-05 08:00:09,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278301939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 08:00:09,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 08:00:09,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-05 08:00:09,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637561314] [2022-04-05 08:00:09,684 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 08:00:09,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 08:00:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:00:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 08:00:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-05 08:00:09,685 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-05 08:00:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:00:10,967 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2022-04-05 08:00:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 08:00:10,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-04-05 08:00:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:00:10,969 INFO L225 Difference]: With dead ends: 350 [2022-04-05 08:00:10,969 INFO L226 Difference]: Without dead ends: 287 [2022-04-05 08:00:10,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-04-05 08:00:10,970 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:00:10,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 368 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 08:00:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-05 08:00:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-04-05 08:00:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-05 08:00:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-04-05 08:00:10,998 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-04-05 08:00:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:00:10,998 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-04-05 08:00:10,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-05 08:00:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-04-05 08:00:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-05 08:00:10,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:00:10,999 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 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] [2022-04-05 08:00:11,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 08:00:11,215 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,SelfDestructingSolverStorable12 [2022-04-05 08:00:11,215 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:00:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:00:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-04-05 08:00:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:00:11,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717240715] [2022-04-05 08:00:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:00:11,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:00:11,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480531944] [2022-04-05 08:00:11,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 08:00:11,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:00:11,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:00:11,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:00:11,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 08:00:11,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 08:00:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 08:00:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:00:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:00:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 08:00:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:00:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 08:00:11,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:00:11,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717240715] [2022-04-05 08:00:11,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:00:11,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480531944] [2022-04-05 08:00:11,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480531944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:00:11,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:00:11,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-04-05 08:00:11,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508954394] [2022-04-05 08:00:11,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:00:11,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:00:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:00:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:00:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:00:11,579 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-05 08:00:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:00:11,667 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2022-04-05 08:00:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 08:00:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-04-05 08:00:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:00:11,671 INFO L225 Difference]: With dead ends: 306 [2022-04-05 08:00:11,672 INFO L226 Difference]: Without dead ends: 259 [2022-04-05 08:00:11,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:00:11,672 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:00:11,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 133 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:00:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-05 08:00:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-04-05 08:00:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-05 08:00:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-04-05 08:00:11,695 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-04-05 08:00:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:00:11,695 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-04-05 08:00:11,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-05 08:00:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-04-05 08:00:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-05 08:00:11,696 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:00:11,696 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 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] [2022-04-05 08:00:11,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 08:00:11,919 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,SelfDestructingSolverStorable13 [2022-04-05 08:00:11,919 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:00:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:00:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-04-05 08:00:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:00:11,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300663466] [2022-04-05 08:00:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:00:11,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:00:11,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774447954] [2022-04-05 08:00:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:11,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:00:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:00:11,929 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) [2022-04-05 08:00:11,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 08:00:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:00:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 08:00:11,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:00:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 08:00:12,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:00:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 08:00:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:00:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300663466] [2022-04-05 08:00:12,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:00:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774447954] [2022-04-05 08:00:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774447954] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:00:12,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:00:12,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-05 08:00:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048635106] [2022-04-05 08:00:12,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:00:12,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 08:00:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:00:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 08:00:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:00:12,614 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-05 08:00:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:00:12,908 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2022-04-05 08:00:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 08:00:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-04-05 08:00:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:00:12,910 INFO L225 Difference]: With dead ends: 254 [2022-04-05 08:00:12,910 INFO L226 Difference]: Without dead ends: 229 [2022-04-05 08:00:12,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-05 08:00:12,912 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 08:00:12,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 250 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 08:00:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-05 08:00:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-04-05 08:00:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-05 08:00:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-04-05 08:00:12,937 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-04-05 08:00:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:00:12,937 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-04-05 08:00:12,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-05 08:00:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-04-05 08:00:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-05 08:00:12,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:00:12,938 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:00:12,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-05 08:00:13,151 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,SelfDestructingSolverStorable14 [2022-04-05 08:00:13,151 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:00:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:00:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-04-05 08:00:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:00:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524640850] [2022-04-05 08:00:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:00:13,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:00:13,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308738500] [2022-04-05 08:00:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:13,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:00:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:00:13,168 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) [2022-04-05 08:00:13,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 08:00:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:00:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 08:00:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:00:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-05 08:00:13,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:00:13,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:00:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524640850] [2022-04-05 08:00:13,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:00:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308738500] [2022-04-05 08:00:13,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308738500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:00:13,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:00:13,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:00:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604777947] [2022-04-05 08:00:13,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:00:13,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:00:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:00:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:00:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:00:13,389 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 08:00:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:00:13,454 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-04-05 08:00:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:00:13,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-04-05 08:00:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:00:13,458 INFO L225 Difference]: With dead ends: 249 [2022-04-05 08:00:13,458 INFO L226 Difference]: Without dead ends: 228 [2022-04-05 08:00:13,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:00:13,461 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:00:13,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 101 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:00:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-05 08:00:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-04-05 08:00:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-05 08:00:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-04-05 08:00:13,486 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-04-05 08:00:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:00:13,486 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-04-05 08:00:13,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 08:00:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-04-05 08:00:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-05 08:00:13,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:00:13,488 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:00:13,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 08:00:13,705 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,SelfDestructingSolverStorable15 [2022-04-05 08:00:13,705 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:00:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:00:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-04-05 08:00:13,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:00:13,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370294529] [2022-04-05 08:00:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:00:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:00:13,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:00:13,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815006830] [2022-04-05 08:00:13,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 08:00:13,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:00:13,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:00:13,714 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) [2022-04-05 08:00:13,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 08:00:14,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 08:00:14,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 08:00:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 08:00:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:00:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-05 08:00:14,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:00:52,113 WARN L232 SmtUtils]: Spent 14.61s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 08:01:50,272 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse11 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse11 1) .cse0)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse0 (+ c_main_~q~0 c_main_~p~0 .cse11))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) (div c_main_~d~0 2))) (.cse7 (not .cse5))) (and (or (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))))) is different from true [2022-04-05 08:03:09,234 WARN L232 SmtUtils]: Spent 47.92s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 08:09:16,231 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse11 (mod c_main_~B~0 4294967296)) (.cse12 (div (* 2 c_main_~p~0) 2))) (let ((.cse0 (* .cse11 .cse12))) (or (not (= .cse0 (div (* 2 c_main_~d~0) 2))) (let ((.cse3 (= (mod .cse12 2) 0)) (.cse13 (div .cse12 2))) (let ((.cse1 (< (* c_main_~p~0 .cse11) 0)) (.cse2 (= (mod .cse0 2) 0)) (.cse10 (* (+ c_main_~q~0 .cse12 .cse13) .cse11)) (.cse9 (not .cse3)) (.cse4 (mod c_main_~A~0 4294967296)) (.cse5 (* (- 1) (div .cse0 2))) (.cse6 (* .cse11 (+ c_main_~q~0 .cse12 .cse13 1))) (.cse7 (* (- 1) .cse0))) (and (or (and .cse1 (not .cse2)) (let ((.cse8 (< c_main_~p~0 0))) (and (or .cse3 (= .cse4 (+ .cse5 .cse6 .cse7 c_main_~r~0)) (not .cse8)) (or (and .cse9 .cse8) (= .cse4 (+ .cse10 .cse5 .cse7 c_main_~r~0)))))) (or (not .cse1) .cse2 (and (or (= .cse4 (+ .cse10 (- 1) .cse5 .cse7 c_main_~r~0)) .cse9) (or (= .cse4 (+ (- 1) .cse5 .cse6 .cse7 c_main_~r~0)) .cse3))))))))) is different from true