/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/loops-crafted-1/vnew2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:32:45,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:32:45,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:32:45,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 10:32:45,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 10:32:45,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 10:32:45,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 10:32:45,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 10:32:45,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 10:32:45,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 10:32:45,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 10:32:45,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 10:32:45,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:32:45,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:32:45,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:32:45,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:32:45,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:32:45,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:32:45,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:32:45,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:32:45,775 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:32:45,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:32:45,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:32:45,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:32:45,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:32:45,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 10:32:45,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:32:45,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:32:45,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:32:45,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:32:45,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:32:45,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:32:45,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:32:45,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:32:45,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:32:45,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:32:45,810 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:32:45,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:32:45,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:32:45,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:32:45,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:32:45,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:32:45,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:32:45,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:32:45,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:32:45,813 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:32:45,813 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:32:45,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:32:45,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:32:45,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:32:45,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:32:45,997 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:32:45,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/vnew2.c [2022-04-06 10:32:46,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63338e2ea/de11ad1e5ea64970824b823f095136ab/FLAG04537a531 [2022-04-06 10:32:46,384 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:32:46,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/vnew2.c [2022-04-06 10:32:46,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63338e2ea/de11ad1e5ea64970824b823f095136ab/FLAG04537a531 [2022-04-06 10:32:46,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63338e2ea/de11ad1e5ea64970824b823f095136ab [2022-04-06 10:32:46,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:32:46,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:32:46,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:32:46,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:32:46,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:32:46,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:32:46" (1/1) ... [2022-04-06 10:32:46,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4c00f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:46, skipping insertion in model container [2022-04-06 10:32:46,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:32:46" (1/1) ... [2022-04-06 10:32:46,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:32:46,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:32:46,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/vnew2.c[403,416] [2022-04-06 10:32:46,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:32:46,974 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:32:46,982 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/vnew2.c[403,416] [2022-04-06 10:32:46,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:32:47,001 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:32:47,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47 WrapperNode [2022-04-06 10:32:47,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:32:47,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:32:47,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:32:47,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:32:47,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:32:47,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:32:47,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:32:47,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:32:47,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:32:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:47,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 10:32:47,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 10:32:47,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:32:47,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:32:47,091 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:32:47,091 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 10:32:47,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 10:32:47,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:32:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:32:47,131 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:32:47,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:32:47,240 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:32:47,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:32:47,244 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 10:32:47,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:47 BoogieIcfgContainer [2022-04-06 10:32:47,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:32:47,246 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:32:47,246 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:32:47,247 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:32:47,249 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:47" (1/1) ... [2022-04-06 10:32:47,250 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:32:47,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:32:47 BasicIcfg [2022-04-06 10:32:47,265 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:32:47,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:32:47,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:32:47,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:32:47,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:32:46" (1/4) ... [2022-04-06 10:32:47,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d8bef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:32:47, skipping insertion in model container [2022-04-06 10:32:47,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:47" (2/4) ... [2022-04-06 10:32:47,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d8bef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:32:47, skipping insertion in model container [2022-04-06 10:32:47,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:47" (3/4) ... [2022-04-06 10:32:47,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d8bef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:32:47, skipping insertion in model container [2022-04-06 10:32:47,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:32:47" (4/4) ... [2022-04-06 10:32:47,282 INFO L111 eAbstractionObserver]: Analyzing ICFG vnew2.cqvasr [2022-04-06 10:32:47,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:32:47,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 10:32:47,315 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:32:47,319 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 10:32:47,319 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 10:32:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:32:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 10:32:47,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:47,337 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:47,338 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash -310389807, now seen corresponding path program 1 times [2022-04-06 10:32:47,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:47,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841313419] [2022-04-06 10:32:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:32:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:32:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841313419] [2022-04-06 10:32:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841313419] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:32:47,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:32:47,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 10:32:47,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923392842] [2022-04-06 10:32:47,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:32:47,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 10:32:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 10:32:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:32:47,485 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:47,511 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-06 10:32:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 10:32:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 10:32:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:47,520 INFO L225 Difference]: With dead ends: 34 [2022-04-06 10:32:47,520 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 10:32:47,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:32:47,527 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:47,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:32:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 10:32:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 10:32:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 10:32:47,546 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 13 [2022-04-06 10:32:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:47,547 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 10:32:47,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 10:32:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 10:32:47,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:47,547 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:47,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:32:47,548 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash -281760656, now seen corresponding path program 1 times [2022-04-06 10:32:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333772421] [2022-04-06 10:32:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:47,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:32:47,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129549153] [2022-04-06 10:32:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:47,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:47,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:47,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:32:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 10:32:47,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:32:47,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 10:32:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:47,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333772421] [2022-04-06 10:32:47,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:32:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129549153] [2022-04-06 10:32:47,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129549153] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:32:47,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:32:47,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 10:32:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692974129] [2022-04-06 10:32:47,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:32:47,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 10:32:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 10:32:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 10:32:47,677 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:47,693 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-04-06 10:32:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 10:32:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 10:32:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:47,694 INFO L225 Difference]: With dead ends: 21 [2022-04-06 10:32:47,694 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 10:32:47,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:32:47,695 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:47,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:32:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 10:32:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 10:32:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 10:32:47,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-06 10:32:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:47,699 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 10:32:47,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 10:32:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 10:32:47,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:47,700 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:47,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:47,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:47,911 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 683692065, now seen corresponding path program 1 times [2022-04-06 10:32:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:47,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109839629] [2022-04-06 10:32:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:47,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:32:47,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984730189] [2022-04-06 10:32:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:47,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:47,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:47,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 10:32:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:32:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 10:32:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:32:48,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:32:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:48,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109839629] [2022-04-06 10:32:48,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:32:48,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984730189] [2022-04-06 10:32:48,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984730189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:48,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:32:48,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-04-06 10:32:48,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070977386] [2022-04-06 10:32:48,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:48,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 10:32:48,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 10:32:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 10:32:48,549 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 10:32:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:32:54,024 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-06 10:32:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 10:32:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-04-06 10:32:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:32:54,025 INFO L225 Difference]: With dead ends: 28 [2022-04-06 10:32:54,025 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 10:32:54,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-04-06 10:32:54,027 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:32:54,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 10:32:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 10:32:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 10:32:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:32:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 10:32:54,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2022-04-06 10:32:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:32:54,031 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 10:32:54,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 10:32:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 10:32:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 10:32:54,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:32:54,032 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:32:54,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 10:32:54,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 10:32:54,232 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:32:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:32:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -958885712, now seen corresponding path program 2 times [2022-04-06 10:32:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:32:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177655147] [2022-04-06 10:32:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:32:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:32:54,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:32:54,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225590246] [2022-04-06 10:32:54,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:32:54,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:32:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:32:54,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:32:54,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 10:32:54,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:32:54,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:32:54,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 10:32:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:32:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:32:54,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:32:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:32:56,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:32:56,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177655147] [2022-04-06 10:32:56,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:32:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225590246] [2022-04-06 10:32:56,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225590246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:32:56,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:32:56,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-04-06 10:32:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094609164] [2022-04-06 10:32:56,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:32:56,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 10:32:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:32:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 10:32:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-04-06 10:32:56,748 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 10:36:14,126 WARN L232 SmtUtils]: Spent 3.13m on a formula simplification. DAG size of input: 99 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:36:15,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:36:18,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:36:19,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:37:43,834 WARN L232 SmtUtils]: Spent 1.13m on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:37:45,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:37:51,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:39:02,514 WARN L232 SmtUtils]: Spent 55.58s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:39:04,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:39:34,166 WARN L232 SmtUtils]: Spent 20.64s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:39:35,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:39:37,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:39:39,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:39:41,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:19,700 WARN L232 SmtUtils]: Spent 21.58s on a formula simplification. DAG size of input: 61 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:40:21,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:23,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:30,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:31,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:33,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:35,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:40:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:40:54,713 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-04-06 10:40:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 10:40:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 10:40:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:40:54,714 INFO L225 Difference]: With dead ends: 42 [2022-04-06 10:40:54,714 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 10:40:54,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 448.2s TimeCoverageRelationStatistics Valid=251, Invalid=651, Unknown=28, NotChecked=0, Total=930 [2022-04-06 10:40:54,715 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 28 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:40:54,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 53 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 126 Invalid, 10 Unknown, 0 Unchecked, 31.9s Time] [2022-04-06 10:40:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 10:40:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 10:40:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:40:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-04-06 10:40:54,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2022-04-06 10:40:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:40:54,726 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-04-06 10:40:54,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 10:40:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-04-06 10:40:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 10:40:54,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:40:54,727 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:40:54,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 10:40:54,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:54,940 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:40:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:40:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash 916237072, now seen corresponding path program 3 times [2022-04-06 10:40:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:40:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069986483] [2022-04-06 10:40:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:40:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:40:54,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:40:54,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315722555] [2022-04-06 10:40:54,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:40:54,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:40:54,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:40:54,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:40:54,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 10:40:55,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 10:40:55,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:40:55,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 10:40:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:40:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:40:55,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:41:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069986483] [2022-04-06 10:41:01,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:41:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315722555] [2022-04-06 10:41:01,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315722555] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:01,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:41:01,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2022-04-06 10:41:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335218086] [2022-04-06 10:41:01,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:01,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 10:41:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 10:41:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:41:01,995 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 10:41:04,247 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse15 (mod c_main_~j~0 4294967296)) (.cse22 (mod c_main_~i~0 4294967296)) (.cse1 (mod (+ 2 c_~SIZE~0) 4294967296))) (and (let ((.cse0 (mod (+ c_main_~i~0 18) 4294967296))) (or (<= 0 (div (* (- 1) .cse0) 4294967296)) (let ((.cse2 (mod (+ c_main_~j~0 18) 4294967296))) (and (not (= (mod (mod .cse0 .cse1) 4294967296) 0)) (= .cse0 .cse2) (= .cse2 (mod (+ 18 c_main_~k~0) 4294967296)))))) (let ((.cse4 (mod (+ c_main_~i~0 27) 4294967296))) (or (let ((.cse3 (mod (+ c_main_~j~0 27) 4294967296))) (and (= .cse3 .cse4) (= (mod (+ 27 c_main_~k~0) 4294967296) .cse3) (not (= (mod (mod .cse4 .cse1) 4294967296) 0)))) (<= 0 (div (* (- 1) .cse4) 4294967296)))) (let ((.cse5 (mod (+ c_main_~i~0 6) 4294967296))) (or (<= 0 (div (* (- 1) .cse5) 4294967296)) (let ((.cse6 (mod (+ 6 c_main_~j~0) 4294967296))) (and (= .cse6 .cse5) (= .cse6 (mod (+ 6 c_main_~k~0) 4294967296)) (not (= (mod (mod .cse5 .cse1) 4294967296) 0)))))) (let ((.cse7 (mod (+ c_main_~i~0 3) 4294967296))) (or (let ((.cse8 (mod (+ 3 c_main_~j~0) 4294967296))) (and (not (= (mod (mod .cse7 .cse1) 4294967296) 0)) (= .cse8 .cse7) (= .cse8 (mod (+ 3 c_main_~k~0) 4294967296)))) (<= 0 (div (* (- 1) .cse7) 4294967296)))) (let ((.cse9 (mod (+ c_main_~i~0 21) 4294967296))) (or (<= 0 (div (* (- 1) .cse9) 4294967296)) (let ((.cse10 (mod (+ 21 c_main_~j~0) 4294967296))) (and (= .cse10 (mod (+ 21 c_main_~k~0) 4294967296)) (not (= (mod (mod .cse9 .cse1) 4294967296) 0)) (= .cse10 .cse9))))) (let ((.cse11 (mod (+ c_main_~i~0 24) 4294967296))) (or (<= 0 (div (* (- 1) .cse11) 4294967296)) (let ((.cse12 (mod (+ c_main_~j~0 24) 4294967296))) (and (= .cse12 (mod (+ c_main_~k~0 24) 4294967296)) (not (= (mod (mod .cse11 .cse1) 4294967296) 0)) (= .cse12 .cse11))))) (let ((.cse14 (mod (+ c_main_~i~0 9) 4294967296))) (or (let ((.cse13 (mod (+ 9 c_main_~j~0) 4294967296))) (and (= .cse13 (mod (+ 9 c_main_~k~0) 4294967296)) (not (= (mod (mod .cse14 .cse1) 4294967296) 0)) (= .cse13 .cse14))) (<= 0 (div (* (- 1) .cse14) 4294967296)))) (= .cse15 (mod c_main_~k~0 4294967296)) (let ((.cse16 (mod (+ c_main_~i~0 30) 4294967296))) (or (<= 0 (div (* (- 1) .cse16) 4294967296)) (let ((.cse17 (mod (+ 30 c_main_~j~0) 4294967296))) (and (= .cse17 (mod (+ 30 c_main_~k~0) 4294967296)) (not (= (mod (mod .cse16 .cse1) 4294967296) 0)) (= .cse16 .cse17))))) (= 20000001 c_~SIZE~0) (let ((.cse18 (mod (+ c_main_~i~0 15) 4294967296))) (or (<= 0 (div (* (- 1) .cse18) 4294967296)) (let ((.cse19 (mod (+ 15 c_main_~j~0) 4294967296))) (and (= .cse18 .cse19) (= .cse19 (mod (+ 15 c_main_~k~0) 4294967296)) (not (= (mod (mod .cse18 .cse1) 4294967296) 0)))))) (let ((.cse21 (mod (+ c_main_~i~0 12) 4294967296))) (or (let ((.cse20 (mod (+ c_main_~j~0 12) 4294967296))) (and (= .cse20 (mod (+ 12 c_main_~k~0) 4294967296)) (= .cse20 .cse21) (not (= (mod (mod .cse21 .cse1) 4294967296) 0)))) (<= 0 (div (* (- 1) .cse21) 4294967296)))) (= .cse15 .cse22) (not (= 0 (mod (mod .cse22 .cse1) 4294967296))))) is different from false [2022-04-06 10:44:17,383 WARN L232 SmtUtils]: Spent 2.70m on a formula simplification that was a NOOP. DAG size: 187 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:44:19,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:44:21,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 10:44:24,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []