/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/bresenham-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:26:47,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:26:47,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:26:47,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:26:47,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:26:47,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:26:47,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:26:47,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:26:47,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:26:47,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:26:47,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:26:47,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:26:47,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:26:47,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:26:47,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:26:47,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:26:47,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:26:47,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:26:47,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:26:47,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:26:47,773 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:26:47,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:26:47,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:26:47,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:26:47,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:26:47,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:26:47,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:26:47,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:26:47,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:26:47,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:26:47,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:26:47,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:26:47,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:26:47,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:26:47,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:26:47,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:26:47,817 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:26:47,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:26:47,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:26:47,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:26:47,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:26:47,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:26:47,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:26:47,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:26:47,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:26:47,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:26:47,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:26:47,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:26:47,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:26:47,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:26:47,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:26:47,820 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:26:47,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:26:47,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:26:48,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:26:48,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:26:48,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:26:48,019 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:26:48,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c [2022-03-20 09:26:48,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c457960/005db7c4ca6f4fc19efc710ee1cee309/FLAGa4761e605 [2022-03-20 09:26:48,368 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:26:48,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c [2022-03-20 09:26:48,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c457960/005db7c4ca6f4fc19efc710ee1cee309/FLAGa4761e605 [2022-03-20 09:26:48,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c457960/005db7c4ca6f4fc19efc710ee1cee309 [2022-03-20 09:26:48,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:26:48,803 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:26:48,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:26:48,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:26:48,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:26:48,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:26:48" (1/1) ... [2022-03-20 09:26:48,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dff46cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:48, skipping insertion in model container [2022-03-20 09:26:48,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:26:48" (1/1) ... [2022-03-20 09:26:48,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:26:48,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:26:48,971 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/bresenham-ll_valuebound5.c[597,610] [2022-03-20 09:26:49,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:26:49,015 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:26:49,024 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/bresenham-ll_valuebound5.c[597,610] [2022-03-20 09:26:49,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:26:49,046 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:26:49,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49 WrapperNode [2022-03-20 09:26:49,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:26:49,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:26:49,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:26:49,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:26:49,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:26:49,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:26:49,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:26:49,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:26:49,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:26:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:49,108 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) [2022-03-20 09:26:49,117 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 [2022-03-20 09:26:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:26:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:26:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:26:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:26:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:26:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:26:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:26:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:26:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:26:49,176 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:26:49,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:26:49,267 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:26:49,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:26:49,271 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:26:49,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:26:49 BoogieIcfgContainer [2022-03-20 09:26:49,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:26:49,273 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:26:49,273 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:26:49,286 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:26:49,288 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:26:49" (1/1) ... [2022-03-20 09:26:49,290 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:26:49,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:26:49 BasicIcfg [2022-03-20 09:26:49,319 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:26:49,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:26:49,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:26:49,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:26:49,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:26:48" (1/4) ... [2022-03-20 09:26:49,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c5e86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:26:49, skipping insertion in model container [2022-03-20 09:26:49,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:49" (2/4) ... [2022-03-20 09:26:49,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c5e86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:26:49, skipping insertion in model container [2022-03-20 09:26:49,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:26:49" (3/4) ... [2022-03-20 09:26:49,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c5e86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:26:49, skipping insertion in model container [2022-03-20 09:26:49,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:26:49" (4/4) ... [2022-03-20 09:26:49,324 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound5.cqvasr [2022-03-20 09:26:49,327 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:26:49,327 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:26:49,374 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:26:49,393 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 [2022-03-20 09:26:49,394 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:26:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 09:26:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:26:49,416 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:49,417 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:26:49,417 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:49,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-03-20 09:26:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:49,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147591239] [2022-03-20 09:26:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:26:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:49,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:26:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 09:26:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:26:49,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147591239] [2022-03-20 09:26:49,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147591239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:26:49,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:26:49,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:26:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152087220] [2022-03-20 09:26:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:26:49,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:26:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:26:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:26:49,575 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:26:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:49,612 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-20 09:26:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:26:49,613 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 09:26:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:49,618 INFO L225 Difference]: With dead ends: 57 [2022-03-20 09:26:49,618 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 09:26:49,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:26:49,622 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:26:49,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:26:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 09:26:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 09:26:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 09:26:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 09:26:49,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 09:26:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:49,651 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 09:26:49,651 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:26:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 09:26:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:26:49,652 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:49,652 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:26:49,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:26:49,653 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-03-20 09:26:49,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180918558] [2022-03-20 09:26:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:49,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:49,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57308775] [2022-03-20 09:26:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:49,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:49,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:49,676 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) [2022-03-20 09:26:49,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:26:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 09:26:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:26:49,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:26:49,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180918558] [2022-03-20 09:26:49,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57308775] [2022-03-20 09:26:49,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57308775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:26:49,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:26:49,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:26:49,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064762831] [2022-03-20 09:26:49,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:26:49,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:26:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:26:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:26:49,854 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 09:26:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:49,912 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 09:26:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:26:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 09:26:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:49,914 INFO L225 Difference]: With dead ends: 39 [2022-03-20 09:26:49,914 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:26:49,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:26:49,916 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:26:49,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:26:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:26:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 09:26:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 09:26:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 09:26:49,924 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-20 09:26:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:49,926 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 09:26:49,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 09:26:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 09:26:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:26:49,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:49,927 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:26:49,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 09:26:50,143 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 [2022-03-20 09:26:50,144 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-03-20 09:26:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:50,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743970422] [2022-03-20 09:26:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:50,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:50,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:50,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112823579] [2022-03-20 09:26:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:50,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:50,168 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) [2022-03-20 09:26:50,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:26:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 09:26:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:26:50,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:26:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:26:50,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743970422] [2022-03-20 09:26:50,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112823579] [2022-03-20 09:26:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112823579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:26:50,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:26:50,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 09:26:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093121401] [2022-03-20 09:26:50,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:26:50,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:26:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:26:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:26:50,566 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:26:50,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:50,791 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 09:26:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 09:26:50,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-03-20 09:26:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:50,793 INFO L225 Difference]: With dead ends: 48 [2022-03-20 09:26:50,793 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 09:26:50,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 09:26:50,794 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:26:50,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:26:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 09:26:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 09:26:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 09:26:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 09:26:50,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-03-20 09:26:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:50,801 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 09:26:50,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:26:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 09:26:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:26:50,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:50,803 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:26:50,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:26:51,004 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 [2022-03-20 09:26:51,005 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-03-20 09:26:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495839617] [2022-03-20 09:26:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:51,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:51,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529948724] [2022-03-20 09:26:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:51,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:51,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:51,033 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) [2022-03-20 09:26:51,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:26:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:26:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:26:51,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:26:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:26:51,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495839617] [2022-03-20 09:26:51,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529948724] [2022-03-20 09:26:51,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529948724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:26:51,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:26:51,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 09:26:51,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812694372] [2022-03-20 09:26:51,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:26:51,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 09:26:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 09:26:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:26:51,605 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 09:26:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:52,175 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 09:26:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 09:26:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-03-20 09:26:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:52,176 INFO L225 Difference]: With dead ends: 60 [2022-03-20 09:26:52,176 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 09:26:52,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 09:26:52,178 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:26:52,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 280 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-20 09:26:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 09:26:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-03-20 09:26:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 09:26:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 09:26:52,185 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2022-03-20 09:26:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:52,185 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 09:26:52,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 09:26:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 09:26:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:26:52,186 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:52,186 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:26:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:26:52,403 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 [2022-03-20 09:26:52,403 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1381917339, now seen corresponding path program 1 times [2022-03-20 09:26:52,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:52,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624989328] [2022-03-20 09:26:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:52,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:52,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808721896] [2022-03-20 09:26:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:52,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:52,420 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) [2022-03-20 09:26:52,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:26:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:26:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:52,570 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:26:52,573 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:26:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 09:26:53,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:26:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 09:26:53,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:53,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624989328] [2022-03-20 09:26:53,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:53,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808721896] [2022-03-20 09:26:53,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808721896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:26:53,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:26:53,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 09:26:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931007645] [2022-03-20 09:26:53,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:26:53,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:26:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:26:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:26:53,857 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 09:26:55,913 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 [] [2022-03-20 09:26:59,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:27:01,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:27:03,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:27:05,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:27:08,006 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 [] [2022-03-20 09:27:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:10,181 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-03-20 09:27:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:27:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-03-20 09:27:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:10,182 INFO L225 Difference]: With dead ends: 56 [2022-03-20 09:27:10,182 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 09:27:10,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-03-20 09:27:10,183 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:27:10,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 105 Invalid, 6 Unknown, 0 Unchecked, 12.1s Time] [2022-03-20 09:27:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 09:27:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-20 09:27:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 09:27:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-20 09:27:10,190 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 48 [2022-03-20 09:27:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:10,190 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-20 09:27:10,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 09:27:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-20 09:27:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:27:10,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:27:10,191 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:27:10,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:27:10,407 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 [2022-03-20 09:27:10,407 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:27:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:27:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -137152858, now seen corresponding path program 1 times [2022-03-20 09:27:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:27:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634759764] [2022-03-20 09:27:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:10,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:27:10,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:27:10,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848163205] [2022-03-20 09:27:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:10,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:27:10,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:27:10,423 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) [2022-03-20 09:27:10,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:27:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:27:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:27:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:27:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 09:27:10,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:27:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 09:27:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:27:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634759764] [2022-03-20 09:27:10,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:27:10,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848163205] [2022-03-20 09:27:10,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848163205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:27:10,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:27:10,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 09:27:10,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288181349] [2022-03-20 09:27:10,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:27:10,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 09:27:10,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:27:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 09:27:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:27:10,786 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 09:27:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:10,941 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-03-20 09:27:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:27:10,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-03-20 09:27:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:10,945 INFO L225 Difference]: With dead ends: 65 [2022-03-20 09:27:10,945 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 09:27:10,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-20 09:27:10,947 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:27:10,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:27:10,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 09:27:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-03-20 09:27:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 09:27:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-20 09:27:10,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-03-20 09:27:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:10,958 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-20 09:27:10,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 09:27:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-20 09:27:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:27:10,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:27:10,959 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:27:10,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:27:11,160 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 [2022-03-20 09:27:11,160 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:27:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:27:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash -545218702, now seen corresponding path program 2 times [2022-03-20 09:27:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:27:11,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357615307] [2022-03-20 09:27:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:11,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:27:11,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:27:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246211651] [2022-03-20 09:27:11,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:27:11,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:27:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:27:11,187 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) [2022-03-20 09:27:11,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:27:11,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:27:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:27:11,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:27:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:27:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:27:11,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:27:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:27:11,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:27:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357615307] [2022-03-20 09:27:11,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:27:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246211651] [2022-03-20 09:27:11,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246211651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:27:11,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:27:11,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 09:27:11,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561173804] [2022-03-20 09:27:11,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:27:11,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:27:11,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:27:11,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:27:11,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:27:11,564 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 09:27:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:11,715 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-03-20 09:27:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:27:11,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-03-20 09:27:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:11,716 INFO L225 Difference]: With dead ends: 78 [2022-03-20 09:27:11,716 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 09:27:11,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:27:11,717 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:27:11,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 287 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:27:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 09:27:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-03-20 09:27:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 09:27:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-03-20 09:27:11,725 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-03-20 09:27:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:11,725 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-03-20 09:27:11,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 09:27:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-03-20 09:27:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:27:11,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:27:11,726 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:27:11,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:27:11,943 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 [2022-03-20 09:27:11,943 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:27:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:27:11,943 INFO L85 PathProgramCache]: Analyzing trace with hash 494880272, now seen corresponding path program 3 times [2022-03-20 09:27:11,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:27:11,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131089900] [2022-03-20 09:27:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:11,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:27:11,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:27:11,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9952700] [2022-03-20 09:27:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:27:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:27:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:27:11,951 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) [2022-03-20 09:27:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:27:12,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 09:27:12,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:27:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:27:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:27:13,197 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:13,200 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:13,201 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 09:27:15,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:27:16,250 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:17,960 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 09:27:38,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:27:38,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131089900] [2022-03-20 09:27:38,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:27:38,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9952700] [2022-03-20 09:27:38,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9952700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:27:38,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:27:38,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 09:27:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762810909] [2022-03-20 09:27:38,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:27:38,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 09:27:38,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:27:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 09:27:38,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=497, Unknown=5, NotChecked=0, Total=600 [2022-03-20 09:27:38,793 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 09:27:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:51,843 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-20 09:27:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:27:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2022-03-20 09:27:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:51,844 INFO L225 Difference]: With dead ends: 62 [2022-03-20 09:27:51,844 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:27:51,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=236, Invalid=1091, Unknown=5, NotChecked=0, Total=1332 [2022-03-20 09:27:51,845 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:27:51,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 232 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 245 Invalid, 0 Unknown, 41 Unchecked, 2.1s Time] [2022-03-20 09:27:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:27:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:27:51,846 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) [2022-03-20 09:27:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:27:51,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-03-20 09:27:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:51,846 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:27:51,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 09:27:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:27:51,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:27:51,848 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:27:51,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:27:52,071 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 [2022-03-20 09:27:52,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:28:18,630 WARN L232 SmtUtils]: Spent 26.49s on a formula simplification. DAG size of input: 114 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:28:33,392 WARN L232 SmtUtils]: Spent 14.70s on a formula simplification. DAG size of input: 134 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:28:33,919 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|)) [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:28:33,919 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:28:33,919 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-20 09:28:33,919 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 09:28:33,919 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-20 09:28:33,920 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 5)) [2022-03-20 09:28:33,920 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-20 09:28:33,920 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse4 (* main_~Y~0 main_~x~0))) (let ((.cse0 (* main_~Y~0 2)) (.cse1 (* 2 .cse4))) (and (= (+ .cse0 .cse1) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 5) (or (<= main_~x~0 main_~X~0) (and (let ((.cse3 (+ (div (+ main_~X~0 main_~v~0) (- 2)) main_~Y~0 .cse4))) (or (let ((.cse2 (div .cse3 main_~X~0))) (= (+ main_~X~0 main_~v~0 (* (* .cse2 main_~x~0) 2)) (+ .cse0 (* .cse2 2) .cse1))) (not (= (mod .cse3 main_~X~0) 0)))) (or (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))))) (<= main_~Y~0 5)))) [2022-03-20 09:28:33,920 INFO L882 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:28:33,938 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* main_~Y~0 2)) (.cse0 (* 2 main_~xy~0)) (.cse4 (* 2 (* main_~Y~0 main_~x~0))) (.cse2 (* 2 main_~yx~0)) (.cse3 (<= main_~x~0 main_~X~0))) (and (= (+ .cse0 main_~X~0 main_~v~0) (+ .cse1 .cse2)) (or .cse3 (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))) (= (+ .cse1 .cse4) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 5) (or (= (+ .cse0 (* main_~y~0 2) .cse4) (+ (* 2 (* main_~y~0 main_~x~0)) .cse2)) .cse3) (<= main_~Y~0 5))) [2022-03-20 09:28:33,940 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse2 (* main_~y~0 2)) (.cse0 (* main_~Y~0 2)) (.cse1 (* 2 (* main_~Y~0 main_~x~0)))) (and (= (+ .cse0 .cse1) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (= (+ .cse2 .cse0 (* 2 main_~yx~0)) (+ (* 2 main_~xy~0) main_~X~0 main_~v~0)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ .cse2 .cse0 .cse1)))) [2022-03-20 09:28:33,940 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:28:33,940 INFO L882 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-20 09:28:33,941 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:28:33,943 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-20 09:28:33,944 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:28:33,950 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,950 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,954 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,955 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:28:33 BasicIcfg [2022-03-20 09:28:33,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:28:33,956 INFO L158 Benchmark]: Toolchain (without parser) took 105153.71ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 184.3MB in the beginning and 222.6MB in the end (delta: -38.3MB). Peak memory consumption was 145.9MB. Max. memory is 8.0GB. [2022-03-20 09:28:33,956 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 209.7MB. Free memory is still 169.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:28:33,956 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.50ms. Allocated memory is still 209.7MB. Free memory was 184.0MB in the beginning and 182.2MB in the end (delta: 1.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 09:28:33,957 INFO L158 Benchmark]: Boogie Preprocessor took 33.79ms. Allocated memory is still 209.7MB. Free memory was 181.9MB in the beginning and 180.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 09:28:33,957 INFO L158 Benchmark]: RCFGBuilder took 190.88ms. Allocated memory is still 209.7MB. Free memory was 180.4MB in the beginning and 170.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 09:28:33,957 INFO L158 Benchmark]: IcfgTransformer took 46.15ms. Allocated memory is still 209.7MB. Free memory was 170.0MB in the beginning and 168.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:28:33,957 INFO L158 Benchmark]: TraceAbstraction took 104635.80ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 167.9MB in the beginning and 222.6MB in the end (delta: -54.7MB). Peak memory consumption was 129.1MB. Max. memory is 8.0GB. [2022-03-20 09:28:33,958 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 209.7MB. Free memory is still 169.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 243.50ms. Allocated memory is still 209.7MB. Free memory was 184.0MB in the beginning and 182.2MB in the end (delta: 1.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.79ms. Allocated memory is still 209.7MB. Free memory was 181.9MB in the beginning and 180.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 190.88ms. Allocated memory is still 209.7MB. Free memory was 180.4MB in the beginning and 170.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 46.15ms. Allocated memory is still 209.7MB. Free memory was 170.0MB in the beginning and 168.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 104635.80ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 167.9MB in the beginning and 222.6MB in the end (delta: -54.7MB). Peak memory consumption was 129.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] * 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: 16]: 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: 104.6s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 41.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 14.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 1422 SdHoareTripleChecker+Invalid, 14.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 105 IncrementalHoareTripleChecker+Unchecked, 1229 mSDsCounter, 100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1169 IncrementalHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 100 mSolverCounterUnsat, 193 mSDtfsCounter, 1169 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 632 GetRequests, 492 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, InterpolantAutomatonStates: 103, 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, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 29 PreInvPairs, 50 NumberOfFragments, 300 HoareAnnotationTreeSize, 29 FomulaSimplifications, 792 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4612 FormulaSimplificationTreeSizeReductionInter, 41.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 29.9s InterpolantComputationTime, 327 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 594 ConstructedInterpolants, 6 QuantifiedInterpolants, 3393 SizeOfPredicates, 50 NumberOfNonLiveVariables, 854 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 339/426 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: 32]: Loop Invariant [2022-03-20 09:28:33,966 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,966 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:28:33,967 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] Derived loop invariant: ((((Y * 2 + 2 * (Y * x) == X * y * 2 + X + v && 0 <= Y) && 0 <= X) && X <= 5) && (x <= X || ((X + v + ((X + v) / -2 + Y + Y * x) / X * x * 2 == Y * 2 + ((X + v) / -2 + Y + Y * x) / X * 2 + 2 * (Y * x) || !(((X + v) / -2 + Y + Y * x) % X == 0)) && ((forall main_~y~0 : int :: 2 * (main_~y~0 * x) + X + v == main_~y~0 * 2 + Y * 2 + 2 * (Y * x)) || !(X == 0))))) && Y <= 5 RESULT: Ultimate proved your program to be correct! [2022-03-20 09:28:34,169 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-20 09:28:34,194 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...