/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/prodbin-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 22:46:37,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 22:46:37,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 22:46:37,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 22:46:37,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 22:46:37,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 22:46:37,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 22:46:37,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 22:46:37,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 22:46:38,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 22:46:38,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 22:46:38,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 22:46:38,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 22:46:38,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 22:46:38,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 22:46:38,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 22:46:38,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 22:46:38,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 22:46:38,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 22:46:38,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 22:46:38,009 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 22:46:38,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 22:46:38,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 22:46:38,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 22:46:38,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 22:46:38,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 22:46:38,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 22:46:38,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 22:46:38,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 22:46:38,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 22:46:38,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 22:46:38,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 22:46:38,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 22:46:38,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 22:46:38,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 22:46:38,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 22:46:38,058 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 22:46:38,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 22:46:38,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 22:46:38,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 22:46:38,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 22:46:38,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 22:46:38,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:46:38,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 22:46:38,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 22:46:38,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 22:46:38,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 22:46:38,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 22:46:38,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 22:46:38,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 22:46:38,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 22:46:38,061 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 22:46:38,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 22:46:38,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 22:46:38,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 22:46:38,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 22:46:38,248 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 22:46:38,249 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 22:46:38,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-03-17 22:46:38,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b93a5ff8/6d4afead5dac48f1bb39ad4c1be0c221/FLAG7441b865e [2022-03-17 22:46:38,622 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 22:46:38,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-03-17 22:46:38,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b93a5ff8/6d4afead5dac48f1bb39ad4c1be0c221/FLAG7441b865e [2022-03-17 22:46:38,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b93a5ff8/6d4afead5dac48f1bb39ad4c1be0c221 [2022-03-17 22:46:38,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 22:46:38,646 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 22:46:38,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 22:46:38,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 22:46:38,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 22:46:38,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5069e914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38, skipping insertion in model container [2022-03-17 22:46:38,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 22:46:38,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 22:46:38,829 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/prodbin-ll_valuebound5.c[537,550] [2022-03-17 22:46:38,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:46:38,849 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 22:46:38,858 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/prodbin-ll_valuebound5.c[537,550] [2022-03-17 22:46:38,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:46:38,878 INFO L208 MainTranslator]: Completed translation [2022-03-17 22:46:38,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38 WrapperNode [2022-03-17 22:46:38,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 22:46:38,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 22:46:38,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 22:46:38,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 22:46:38,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 22:46:38,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 22:46:38,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 22:46:38,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 22:46:38,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (1/1) ... [2022-03-17 22:46:38,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:46:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:38,934 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) [2022-03-17 22:46:38,959 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 [2022-03-17 22:46:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 22:46:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 22:46:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 22:46:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 22:46:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 22:46:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 22:46:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 22:46:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 22:46:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 22:46:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 22:46:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 22:46:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 22:46:39,015 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 22:46:39,017 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 22:46:39,096 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 22:46:39,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 22:46:39,100 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 22:46:39,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:46:39 BoogieIcfgContainer [2022-03-17 22:46:39,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 22:46:39,102 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 22:46:39,102 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 22:46:39,103 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 22:46:39,105 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:46:39" (1/1) ... [2022-03-17 22:46:39,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:46:39 BasicIcfg [2022-03-17 22:46:39,117 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 22:46:39,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 22:46:39,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 22:46:39,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 22:46:39,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:46:38" (1/4) ... [2022-03-17 22:46:39,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb6c4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:46:39, skipping insertion in model container [2022-03-17 22:46:39,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:46:38" (2/4) ... [2022-03-17 22:46:39,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb6c4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:46:39, skipping insertion in model container [2022-03-17 22:46:39,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:46:39" (3/4) ... [2022-03-17 22:46:39,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb6c4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:46:39, skipping insertion in model container [2022-03-17 22:46:39,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:46:39" (4/4) ... [2022-03-17 22:46:39,122 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.cqvasr [2022-03-17 22:46:39,125 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 22:46:39,125 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 22:46:39,151 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 22:46:39,155 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 [2022-03-17 22:46:39,155 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 22:46:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 22:46:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 22:46:39,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:39,169 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:39,170 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-03-17 22:46:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:39,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607430375] [2022-03-17 22:46:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:39,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 22:46:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 22:46:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 22:46:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 22:46:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:46:39,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:46:39,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607430375] [2022-03-17 22:46:39,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607430375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:46:39,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:46:39,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 22:46:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91537067] [2022-03-17 22:46:39,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:46:39,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 22:46:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:46:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 22:46:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:46:39,331 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:46:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:46:39,406 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-17 22:46:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 22:46:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 22:46:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:46:39,416 INFO L225 Difference]: With dead ends: 57 [2022-03-17 22:46:39,416 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 22:46:39,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:46:39,420 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:46:39,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:46:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 22:46:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-17 22:46:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 22:46:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-17 22:46:39,454 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-17 22:46:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:46:39,455 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-17 22:46:39,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:46:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-17 22:46:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 22:46:39,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:39,457 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:39,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 22:46:39,458 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-03-17 22:46:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:39,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727548534] [2022-03-17 22:46:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:39,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:46:39,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916446457] [2022-03-17 22:46:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:39,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:39,494 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) [2022-03-17 22:46:39,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 22:46:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 22:46:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:46:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:46:39,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:46:39,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:46:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727548534] [2022-03-17 22:46:39,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:46:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916446457] [2022-03-17 22:46:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916446457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:46:39,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:46:39,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 22:46:39,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719921001] [2022-03-17 22:46:39,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:46:39,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 22:46:39,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:46:39,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 22:46:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 22:46:39,635 INFO L87 Difference]: Start difference. First operand 27 states and 31 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 22:46:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:46:39,669 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-17 22:46:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 22:46:39,669 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-17 22:46:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:46:39,670 INFO L225 Difference]: With dead ends: 39 [2022-03-17 22:46:39,670 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 22:46:39,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 22:46:39,671 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:46:39,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:46:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 22:46:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-17 22:46:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 22:46:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-17 22:46:39,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-17 22:46:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:46:39,678 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-17 22:46:39,679 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 22:46:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-17 22:46:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 22:46:39,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:39,680 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:39,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 22:46:39,895 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 [2022-03-17 22:46:39,896 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-03-17 22:46:39,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:39,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718447078] [2022-03-17 22:46:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:39,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:46:39,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860071113] [2022-03-17 22:46:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:39,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:39,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:39,914 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) [2022-03-17 22:46:39,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 22:46:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 22:46:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:46:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:46:40,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:46:40,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:46:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718447078] [2022-03-17 22:46:40,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:46:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860071113] [2022-03-17 22:46:40,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860071113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:46:40,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:46:40,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 22:46:40,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365631775] [2022-03-17 22:46:40,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:46:40,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 22:46:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:46:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 22:46:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 22:46:40,066 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:46:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:46:40,129 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-17 22:46:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 22:46:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-17 22:46:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:46:40,130 INFO L225 Difference]: With dead ends: 43 [2022-03-17 22:46:40,131 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 22:46:40,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 22:46:40,132 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:46:40,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:46:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 22:46:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-17 22:46:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 22:46:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-17 22:46:40,136 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-17 22:46:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:46:40,137 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-17 22:46:40,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:46:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-17 22:46:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 22:46:40,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:40,139 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:40,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 22:46:40,355 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 [2022-03-17 22:46:40,355 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-03-17 22:46:40,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:40,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142680775] [2022-03-17 22:46:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:40,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:46:40,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398588843] [2022-03-17 22:46:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:40,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:40,367 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) [2022-03-17 22:46:40,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 22:46:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 22:46:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:46:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:46:40,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:46:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:46:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:46:48,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142680775] [2022-03-17 22:46:48,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:46:48,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398588843] [2022-03-17 22:46:48,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398588843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:46:48,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:46:48,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-17 22:46:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011416118] [2022-03-17 22:46:48,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:46:48,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 22:46:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:46:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 22:46:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-17 22:46:48,714 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 22:46:51,607 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 [] [2022-03-17 22:46:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:46:53,880 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-17 22:46:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 22:46:53,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-03-17 22:46:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:46:53,882 INFO L225 Difference]: With dead ends: 52 [2022-03-17 22:46:53,883 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 22:46:53,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-17 22:46:53,883 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:46:53,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 171 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-03-17 22:46:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 22:46:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-17 22:46:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 22:46:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-03-17 22:46:53,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2022-03-17 22:46:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:46:53,892 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-03-17 22:46:53,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 22:46:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-03-17 22:46:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 22:46:53,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:53,893 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:53,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 22:46:54,109 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 [2022-03-17 22:46:54,110 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-03-17 22:46:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:54,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213478588] [2022-03-17 22:46:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:54,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:54,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:46:54,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424130136] [2022-03-17 22:46:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:54,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:54,121 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) [2022-03-17 22:46:54,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 22:46:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 22:46:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:46:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:46:55,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:46:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:46:56,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:46:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213478588] [2022-03-17 22:46:56,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:46:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424130136] [2022-03-17 22:46:56,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424130136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:46:56,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:46:56,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-17 22:46:56,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526424497] [2022-03-17 22:46:56,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:46:56,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 22:46:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:46:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 22:46:56,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-17 22:46:56,004 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 22:46:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:46:56,685 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-17 22:46:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 22:46:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-03-17 22:46:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:46:56,687 INFO L225 Difference]: With dead ends: 78 [2022-03-17 22:46:56,687 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 22:46:56,688 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-17 22:46:56,689 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 22:46:56,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 177 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 22:46:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 22:46:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-17 22:46:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 22:46:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-03-17 22:46:56,698 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 37 [2022-03-17 22:46:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:46:56,698 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-03-17 22:46:56,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 22:46:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-03-17 22:46:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 22:46:56,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:56,699 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:56,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 22:46:56,919 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 [2022-03-17 22:46:56,919 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-03-17 22:46:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490699190] [2022-03-17 22:46:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:56,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:46:56,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020509107] [2022-03-17 22:46:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:56,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:56,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:46:56,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 22:46:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 22:46:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:46:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 22:46:57,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:46:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 22:46:57,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:46:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490699190] [2022-03-17 22:46:57,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:46:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020509107] [2022-03-17 22:46:57,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020509107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:46:57,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:46:57,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-17 22:46:57,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705825049] [2022-03-17 22:46:57,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:46:57,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 22:46:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:46:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 22:46:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 22:46:57,154 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 22:46:59,159 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 [] [2022-03-17 22:46:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:46:59,245 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-03-17 22:46:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 22:46:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-17 22:46:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:46:59,246 INFO L225 Difference]: With dead ends: 77 [2022-03-17 22:46:59,246 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 22:46:59,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-17 22:46:59,247 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:46:59,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 130 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-17 22:46:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 22:46:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 22:46:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 22:46:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-03-17 22:46:59,255 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 43 [2022-03-17 22:46:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:46:59,255 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-03-17 22:46:59,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 22:46:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-03-17 22:46:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 22:46:59,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:46:59,257 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:46:59,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 22:46:59,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:59,472 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:46:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:46:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 1 times [2022-03-17 22:46:59,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:46:59,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687096353] [2022-03-17 22:46:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:59,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:46:59,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:46:59,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754057501] [2022-03-17 22:46:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:46:59,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:46:59,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:46:59,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:46:59,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 22:46:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:46:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 22:46:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:46:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 22:46:59,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:47:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 22:47:00,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:47:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687096353] [2022-03-17 22:47:00,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:47:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754057501] [2022-03-17 22:47:00,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754057501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:47:00,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:47:00,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-17 22:47:00,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662315499] [2022-03-17 22:47:00,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:47:00,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 22:47:00,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:47:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 22:47:00,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-17 22:47:00,299 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-03-17 22:47:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:47:00,454 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-03-17 22:47:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 22:47:00,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-03-17 22:47:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:47:00,456 INFO L225 Difference]: With dead ends: 89 [2022-03-17 22:47:00,456 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 22:47:00,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-03-17 22:47:00,457 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:47:00,457 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 154 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 84 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-03-17 22:47:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 22:47:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-17 22:47:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 49 states have internal predecessors, (49), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 22:47:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-03-17 22:47:00,464 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 55 [2022-03-17 22:47:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:47:00,464 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-03-17 22:47:00,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-03-17 22:47:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-03-17 22:47:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 22:47:00,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:47:00,465 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:47:00,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 22:47:00,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:47:00,680 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:47:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:47:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -683089742, now seen corresponding path program 2 times [2022-03-17 22:47:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:47:00,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530882038] [2022-03-17 22:47:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:47:00,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:47:00,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:47:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092966268] [2022-03-17 22:47:00,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:47:00,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:47:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:47:00,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:47:00,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 22:47:00,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:47:00,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:47:00,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 22:47:00,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:47:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 22:47:01,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:47:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 22:47:01,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:47:01,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530882038] [2022-03-17 22:47:01,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:47:01,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092966268] [2022-03-17 22:47:01,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092966268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:47:01,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:47:01,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-03-17 22:47:01,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092294908] [2022-03-17 22:47:01,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:47:01,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 22:47:01,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:47:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 22:47:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-17 22:47:01,613 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-17 22:47:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:47:01,973 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-03-17 22:47:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 22:47:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2022-03-17 22:47:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:47:01,976 INFO L225 Difference]: With dead ends: 73 [2022-03-17 22:47:01,976 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 22:47:01,976 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-03-17 22:47:01,977 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:47:01,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 142 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 87 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-03-17 22:47:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 22:47:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 22:47:01,977 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) [2022-03-17 22:47:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 22:47:01,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-03-17 22:47:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:47:01,978 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 22:47:01,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-17 22:47:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 22:47:01,978 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 22:47:01,980 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 22:47:01,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 22:47:02,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:47:02,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 22:47:03,501 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 22:47:03,501 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 22:47:03,501 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 22:47:03,501 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 22:47:03,501 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-17 22:47:03,502 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-17 22:47:03,502 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 5) (<= 0 main_~b~0)) [2022-03-17 22:47:03,502 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-03-17 22:47:03,502 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse3 (= main_~z~0 0)) (.cse2 (<= 1 main_~b~0)) (.cse0 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (.cse1 (<= main_~b~0 5)) (.cse5 (= (* main_~a~0 2) main_~x~0)) (.cse4 (+ main_~y~0 1))) (or (and .cse0 .cse1 (< (* main_~y~0 2) 3) (< 0 main_~y~0) .cse2) (and .cse3 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~y~0 5)) (and (<= 1 (mod .cse4 2)) .cse0 .cse2 (<= 0 .cse4) (<= main_~y~0 1)) (and .cse3 (= main_~y~0 (div main_~b~0 2)) .cse1 .cse5 (not (= (mod main_~b~0 2) 1)) .cse2) (and .cse0 .cse1 .cse5 (< 0 .cse4) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-17 22:47:03,503 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 1 main_~b~0))) [2022-03-17 22:47:03,503 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (= main_~z~0 0)) (.cse2 (<= 1 main_~b~0)) (.cse0 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (.cse1 (<= main_~b~0 5)) (.cse6 (= (* main_~a~0 2) main_~x~0)) (.cse7 (+ main_~y~0 1))) (or (and .cse0 .cse1 (< (* main_~y~0 2) 3) (< 0 main_~y~0) .cse2) (and .cse3 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~y~0 5)) (and .cse3 (= main_~y~0 (div main_~b~0 2)) (exists ((aux_mod_v_main_~y~0_23_28 Int) (aux_div_v_main_~y~0_23_28 Int)) (let ((.cse5 (* aux_div_v_main_~y~0_23_28 2))) (let ((.cse4 (+ .cse5 aux_mod_v_main_~y~0_23_28))) (and (<= 1 aux_mod_v_main_~y~0_23_28) (<= .cse4 5) (<= main_~y~0 (div (+ (- 1) .cse5 aux_mod_v_main_~y~0_23_28) 2)) (<= 0 .cse4) (< aux_mod_v_main_~y~0_23_28 2))))) .cse6 (not (= (mod main_~b~0 2) 1)) .cse2) (and (<= 1 (mod .cse7 2)) .cse0 .cse2 (<= 0 .cse7) (<= main_~y~0 1)) (and .cse0 .cse1 .cse6 (< 0 .cse7) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-03-17 22:47:03,503 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-03-17 22:47:03,504 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-03-17 22:47:03,512 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-03-17 22:47:03,513 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 22:47:03,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:47:03 BasicIcfg [2022-03-17 22:47:03,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 22:47:03,529 INFO L158 Benchmark]: Toolchain (without parser) took 24883.42ms. Allocated memory was 203.4MB in the beginning and 272.6MB in the end (delta: 69.2MB). Free memory was 153.3MB in the beginning and 213.2MB in the end (delta: -59.8MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-03-17 22:47:03,529 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 169.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 22:47:03,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.35ms. Allocated memory is still 203.4MB. Free memory was 153.2MB in the beginning and 180.0MB in the end (delta: -26.8MB). Peak memory consumption was 13.0MB. Max. memory is 8.0GB. [2022-03-17 22:47:03,530 INFO L158 Benchmark]: Boogie Preprocessor took 30.16ms. Allocated memory is still 203.4MB. Free memory was 180.0MB in the beginning and 178.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 22:47:03,530 INFO L158 Benchmark]: RCFGBuilder took 189.21ms. Allocated memory is still 203.4MB. Free memory was 178.9MB in the beginning and 168.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 22:47:03,530 INFO L158 Benchmark]: IcfgTransformer took 15.59ms. Allocated memory is still 203.4MB. Free memory was 168.5MB in the beginning and 167.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 22:47:03,530 INFO L158 Benchmark]: TraceAbstraction took 24410.49ms. Allocated memory was 203.4MB in the beginning and 272.6MB in the end (delta: 69.2MB). Free memory was 166.9MB in the beginning and 213.2MB in the end (delta: -46.3MB). Peak memory consumption was 23.4MB. Max. memory is 8.0GB. [2022-03-17 22:47:03,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 169.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 232.35ms. Allocated memory is still 203.4MB. Free memory was 153.2MB in the beginning and 180.0MB in the end (delta: -26.8MB). Peak memory consumption was 13.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.16ms. Allocated memory is still 203.4MB. Free memory was 180.0MB in the beginning and 178.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 189.21ms. Allocated memory is still 203.4MB. Free memory was 178.9MB in the beginning and 168.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.59ms. Allocated memory is still 203.4MB. Free memory was 168.5MB in the beginning and 167.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 24410.49ms. Allocated memory was 203.4MB in the beginning and 272.6MB in the end (delta: 69.2MB). Free memory was 166.9MB in the beginning and 213.2MB in the end (delta: -46.3MB). Peak memory consumption was 23.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.4s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 193 SdHoareTripleChecker+Valid, 6.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 182 mSDsluCounter, 1001 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 30 IncrementalHoareTripleChecker+Unchecked, 801 mSDsCounter, 107 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 697 IncrementalHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 107 mSolverCounterUnsat, 200 mSDtfsCounter, 697 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 434 SyntacticMatches, 12 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=5, InterpolantAutomatonStates: 81, 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, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 30 PreInvPairs, 45 NumberOfFragments, 318 HoareAnnotationTreeSize, 30 FomulaSimplifications, 218 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 286 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 531 ConstructedInterpolants, 3 QuantifiedInterpolants, 2291 SizeOfPredicates, 25 NumberOfNonLiveVariables, 821 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 320/352 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: 34]: Loop Invariant Derived loop invariant: (((((((z + y * x == b * a && b <= 5) && y * 2 < 3) && 0 < y) && 1 <= b) || ((((z == 0 && b == y) && 1 <= y) && a == x) && y <= 5)) || ((((1 <= (y + 1) % 2 && z + y * x == b * a) && 1 <= b) && 0 <= y + 1) && y <= 1)) || (((((z == 0 && y == b / 2) && b <= 5) && a * 2 == x) && !(b % 2 == 1)) && 1 <= b)) || ((((z + y * x == b * a && b <= 5) && a * 2 == x) && 0 < y + 1) && (-1 + b) / 2 == y) RESULT: Ultimate proved your program to be correct! [2022-03-17 22:47:03,551 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...