/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/ps2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 09:05:52,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 09:05:52,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 09:05:52,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 09:05:52,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 09:05:52,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 09:05:52,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 09:05:52,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 09:05:52,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 09:05:52,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 09:05:52,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 09:05:52,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 09:05:52,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 09:05:52,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 09:05:52,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 09:05:52,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 09:05:52,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 09:05:52,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 09:05:52,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 09:05:52,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 09:05:52,948 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 09:05:52,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 09:05:52,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 09:05:52,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 09:05:52,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 09:05:52,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 09:05:52,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 09:05:52,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 09:05:52,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 09:05:52,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 09:05:52,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 09:05:52,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 09:05:52,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 09:05:52,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 09:05:52,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 09:05:52,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 09:05:52,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 09:05:52,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:05:52,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 09:05:52,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 09:05:52,985 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 09:05:52,985 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 09:05:53,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 09:05:53,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 09:05:53,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 09:05:53,159 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 09:05:53,159 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 09:05:53,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound100.c [2022-04-05 09:05:53,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a509495/6f8c0dd8bc1a40ba8713068bc5911cfd/FLAG43cc8df77 [2022-04-05 09:05:53,521 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 09:05:53,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound100.c [2022-04-05 09:05:53,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a509495/6f8c0dd8bc1a40ba8713068bc5911cfd/FLAG43cc8df77 [2022-04-05 09:05:53,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a509495/6f8c0dd8bc1a40ba8713068bc5911cfd [2022-04-05 09:05:53,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 09:05:53,971 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 09:05:53,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 09:05:53,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 09:05:53,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 09:05:53,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:05:53" (1/1) ... [2022-04-05 09:05:53,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3adf87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:53, skipping insertion in model container [2022-04-05 09:05:53,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:05:53" (1/1) ... [2022-04-05 09:05:53,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 09:05:53,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 09:05:54,091 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/ps2-ll_unwindbound100.c[454,467] [2022-04-05 09:05:54,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:05:54,108 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 09:05:54,117 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/ps2-ll_unwindbound100.c[454,467] [2022-04-05 09:05:54,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:05:54,129 INFO L208 MainTranslator]: Completed translation [2022-04-05 09:05:54,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54 WrapperNode [2022-04-05 09:05:54,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 09:05:54,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 09:05:54,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 09:05:54,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 09:05:54,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 09:05:54,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 09:05:54,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 09:05:54,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 09:05:54,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:05:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:54,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 09:05:54,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 09:05:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 09:05:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 09:05:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 09:05:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 09:05:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 09:05:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 09:05:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 09:05:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 09:05:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 09:05:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 09:05:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 09:05:54,226 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 09:05:54,227 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 09:05:54,293 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 09:05:54,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 09:05:54,296 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 09:05:54,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:05:54 BoogieIcfgContainer [2022-04-05 09:05:54,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 09:05:54,298 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 09:05:54,298 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 09:05:54,299 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 09:05:54,301 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:05:54" (1/1) ... [2022-04-05 09:05:54,302 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 09:05:54,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:05:54 BasicIcfg [2022-04-05 09:05:54,311 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 09:05:54,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 09:05:54,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 09:05:54,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 09:05:54,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 09:05:53" (1/4) ... [2022-04-05 09:05:54,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3030297d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:05:54, skipping insertion in model container [2022-04-05 09:05:54,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:05:54" (2/4) ... [2022-04-05 09:05:54,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3030297d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:05:54, skipping insertion in model container [2022-04-05 09:05:54,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:05:54" (3/4) ... [2022-04-05 09:05:54,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3030297d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:05:54, skipping insertion in model container [2022-04-05 09:05:54,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:05:54" (4/4) ... [2022-04-05 09:05:54,326 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound100.cqvasr [2022-04-05 09:05:54,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 09:05:54,329 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 09:05:54,356 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 09:05:54,360 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 09:05:54,360 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 09:05:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 09:05:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 09:05:54,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:54,374 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:54,374 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2022-04-05 09:05:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:54,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790686044] [2022-04-05 09:05:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:05:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:05:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:05:54,537 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 09:05:54,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:54,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790686044] [2022-04-05 09:05:54,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790686044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:05:54,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:05:54,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 09:05:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824778007] [2022-04-05 09:05:54,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:05:54,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 09:05:54,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 09:05:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:05:54,573 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-05 09:05:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:54,640 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-05 09:05:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 09:05:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-05 09:05:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:54,646 INFO L225 Difference]: With dead ends: 39 [2022-04-05 09:05:54,647 INFO L226 Difference]: Without dead ends: 18 [2022-04-05 09:05:54,648 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 [2022-04-05 09:05:54,665 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:54,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:05:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-05 09:05:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-05 09:05:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 09:05:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-05 09:05:54,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-05 09:05:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:54,696 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-05 09:05:54,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-05 09:05:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-05 09:05:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 09:05:54,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:54,698 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:54,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 09:05:54,698 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2022-04-05 09:05:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310050762] [2022-04-05 09:05:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:54,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984984760] [2022-04-05 09:05:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:54,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:54,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:05:54,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 09:05:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:05:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 09:05:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:54,850 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 09:05:54,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:05:54,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:54,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310050762] [2022-04-05 09:05:54,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984984760] [2022-04-05 09:05:54,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984984760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:05:54,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:05:54,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 09:05:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565537651] [2022-04-05 09:05:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:05:54,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 09:05:54,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 09:05:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 09:05:54,856 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-05 09:05:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:54,873 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-05 09:05:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 09:05:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 12 [2022-04-05 09:05:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:54,875 INFO L225 Difference]: With dead ends: 26 [2022-04-05 09:05:54,875 INFO L226 Difference]: Without dead ends: 19 [2022-04-05 09:05:54,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 09:05:54,876 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:54,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:05:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-05 09:05:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-05 09:05:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 09:05:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-05 09:05:54,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-05 09:05:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:54,886 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-05 09:05:54,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-05 09:05:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-05 09:05:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 09:05:54,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:54,887 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:54,905 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 09:05:55,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:55,096 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2022-04-05 09:05:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:55,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72445856] [2022-04-05 09:05:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:55,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:55,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:55,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818494622] [2022-04-05 09:05:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:55,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:55,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:05:55,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 09:05:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:05:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 09:05:55,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:55,205 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 09:05:55,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:05:55,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72445856] [2022-04-05 09:05:55,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818494622] [2022-04-05 09:05:55,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818494622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:05:55,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:05:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 09:05:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95438795] [2022-04-05 09:05:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:05:55,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:05:55,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:05:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:05:55,209 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-05 09:05:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:55,242 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-05 09:05:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:05:55,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-05 09:05:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:55,243 INFO L225 Difference]: With dead ends: 28 [2022-04-05 09:05:55,244 INFO L226 Difference]: Without dead ends: 25 [2022-04-05 09:05:55,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 09:05:55,247 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:55,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:05:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-05 09:05:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-05 09:05:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 09:05:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-05 09:05:55,255 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-05 09:05:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:55,255 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-05 09:05:55,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-05 09:05:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-05 09:05:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 09:05:55,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:55,256 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:55,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 09:05:55,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 09:05:55,466 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2022-04-05 09:05:55,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:55,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074326636] [2022-04-05 09:05:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:55,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:55,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748158254] [2022-04-05 09:05:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:55,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:55,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:05:55,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 09:05:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:05:55,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 09:05:55,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:05:55,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:05:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:05:55,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074326636] [2022-04-05 09:05:55,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:55,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748158254] [2022-04-05 09:05:55,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748158254] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:05:55,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:05:55,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 09:05:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816123344] [2022-04-05 09:05:55,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:05:55,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 09:05:55,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 09:05:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 09:05:55,619 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 09:05:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:55,677 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-05 09:05:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 09:05:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-04-05 09:05:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:55,681 INFO L225 Difference]: With dead ends: 56 [2022-04-05 09:05:55,683 INFO L226 Difference]: Without dead ends: 49 [2022-04-05 09:05:55,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 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 09:05:55,686 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:55,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:05:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-05 09:05:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-04-05 09:05:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 09:05:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-05 09:05:55,717 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2022-04-05 09:05:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:55,717 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-05 09:05:55,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 09:05:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-05 09:05:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 09:05:55,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:55,718 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:55,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-05 09:05:55,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:55,948 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2022-04-05 09:05:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:55,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503271467] [2022-04-05 09:05:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:55,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:55,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543340002] [2022-04-05 09:05:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:55,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:55,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:55,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:05:55,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 09:05:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:05:55,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 09:05:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:05:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:05:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 09:05:56,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503271467] [2022-04-05 09:05:56,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543340002] [2022-04-05 09:05:56,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543340002] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 09:05:56,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:05:56,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 09:05:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617369996] [2022-04-05 09:05:56,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:05:56,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:05:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:05:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 09:05:56,130 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 09:05:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:56,151 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-04-05 09:05:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:05:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-05 09:05:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:56,152 INFO L225 Difference]: With dead ends: 45 [2022-04-05 09:05:56,152 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 09:05:56,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 09:05:56,153 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:56,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:05:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 09:05:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 09:05:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 09:05:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 09:05:56,154 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-04-05 09:05:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:56,154 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 09:05:56,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 09:05:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 09:05:56,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 09:05:56,156 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 09:05:56,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 09:05:56,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:56,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 09:05:56,403 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 09:05:56,403 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 09:05:56,403 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 09:05:56,403 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 09:05:56,403 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-05 09:05:56,403 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 09:05:56,403 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 09:05:56,403 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 18 40) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-05 09:05:56,403 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-05 09:05:56,404 INFO L878 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 40) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 40) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-04-05 09:05:56,404 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-04-05 09:05:56,405 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-04-05 09:05:56,405 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-04-05 09:05:56,407 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-04-05 09:05:56,408 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 09:05:56,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:05:56 BasicIcfg [2022-04-05 09:05:56,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 09:05:56,416 INFO L158 Benchmark]: Toolchain (without parser) took 2445.37ms. Allocated memory was 200.3MB in the beginning and 277.9MB in the end (delta: 77.6MB). Free memory was 146.2MB in the beginning and 226.4MB in the end (delta: -80.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 09:05:56,416 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 200.3MB. Free memory is still 163.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 09:05:56,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.96ms. Allocated memory is still 200.3MB. Free memory was 146.0MB in the beginning and 174.0MB in the end (delta: -28.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 09:05:56,417 INFO L158 Benchmark]: Boogie Preprocessor took 15.47ms. Allocated memory is still 200.3MB. Free memory was 174.0MB in the beginning and 172.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:56,417 INFO L158 Benchmark]: RCFGBuilder took 150.53ms. Allocated memory is still 200.3MB. Free memory was 172.7MB in the beginning and 162.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 09:05:56,417 INFO L158 Benchmark]: IcfgTransformer took 12.73ms. Allocated memory is still 200.3MB. Free memory was 162.4MB in the beginning and 161.1MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:56,418 INFO L158 Benchmark]: TraceAbstraction took 2104.05ms. Allocated memory was 200.3MB in the beginning and 277.9MB in the end (delta: 77.6MB). Free memory was 160.7MB in the beginning and 226.4MB in the end (delta: -65.7MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:56,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 200.3MB. Free memory is still 163.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 158.96ms. Allocated memory is still 200.3MB. Free memory was 146.0MB in the beginning and 174.0MB in the end (delta: -28.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.47ms. Allocated memory is still 200.3MB. Free memory was 174.0MB in the beginning and 172.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 150.53ms. Allocated memory is still 200.3MB. Free memory was 172.7MB in the beginning and 162.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 12.73ms. Allocated memory is still 200.3MB. Free memory was 162.4MB in the beginning and 161.1MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2104.05ms. Allocated memory was 200.3MB in the beginning and 277.9MB in the end (delta: 77.6MB). Free memory was 160.7MB in the beginning and 226.4MB in the end (delta: -65.7MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 240 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 89 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 32 NumberOfFragments, 65 HoareAnnotationTreeSize, 19 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 317 SizeOfPredicates, 5 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || x * 2 == y + y * y RESULT: Ultimate proved your program to be correct! [2022-04-05 09:05:56,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...