/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:26:50,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:26:50,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:26:50,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:26:50,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:26:50,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:26:50,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:26:50,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:26:50,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:26:50,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:26:50,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:26:50,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:26:50,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:26:50,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:26:50,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:26:50,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:26:50,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:26:50,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:26:50,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:26:50,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:26:50,682 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:26:50,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:26:50,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:26:50,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:26:50,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:26:50,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:26:50,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:26:50,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:26:50,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:26:50,707 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 09:26:50,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:26:50,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:26:50,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:26:50,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:26:50,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:26:50,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:26:50,735 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:26:50,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:26:50,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:26:50,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:26:50,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:26:50,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:26:50,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:26:50,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:26:50,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:26:50,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:26:50,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:26:50,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:26:50,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:26:50,738 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:26:50,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:26:50,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:26:50,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:26:50,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:26:50,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:26:50,913 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:26:50,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-03-20 09:26:50,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c07bf244/32b110a11aea4256babe56d4a260266a/FLAG141fcb128 [2022-03-20 09:26:51,339 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:26:51,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-03-20 09:26:51,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c07bf244/32b110a11aea4256babe56d4a260266a/FLAG141fcb128 [2022-03-20 09:26:51,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c07bf244/32b110a11aea4256babe56d4a260266a [2022-03-20 09:26:51,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:26:51,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:26:51,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:26:51,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:26:51,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:26:51,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dd736b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51, skipping insertion in model container [2022-03-20 09:26:51,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:26:51,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:26:51,502 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_valuebound50.c[597,610] [2022-03-20 09:26:51,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:26:51,519 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:26:51,526 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_valuebound50.c[597,610] [2022-03-20 09:26:51,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:26:51,540 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:26:51,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51 WrapperNode [2022-03-20 09:26:51,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:26:51,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:26:51,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:26:51,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:26:51,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:26:51,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:26:51,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:26:51,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:26:51,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:26:51,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:51,584 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 09:26:51,600 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 09:26:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:26:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:26:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:26:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:26:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:26:51,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:26:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:26:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:26:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:26:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:26:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:26:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:26:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:26:51,673 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:26:51,674 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:26:51,831 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:26:51,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:26:51,845 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:26:51,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:26:51 BoogieIcfgContainer [2022-03-20 09:26:51,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:26:51,848 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:26:51,848 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:26:51,860 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:26:51,862 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:26:51" (1/1) ... [2022-03-20 09:26:51,864 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:26:51,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:26:51 BasicIcfg [2022-03-20 09:26:51,886 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:26:51,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:26:51,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:26:51,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:26:51,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:26:51" (1/4) ... [2022-03-20 09:26:51,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ed650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:26:51, skipping insertion in model container [2022-03-20 09:26:51,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:26:51" (2/4) ... [2022-03-20 09:26:51,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ed650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:26:51, skipping insertion in model container [2022-03-20 09:26:51,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:26:51" (3/4) ... [2022-03-20 09:26:51,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ed650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:26:51, skipping insertion in model container [2022-03-20 09:26:51,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:26:51" (4/4) ... [2022-03-20 09:26:51,907 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.cqvasr [2022-03-20 09:26:51,911 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:26:51,912 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:26:51,975 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:26:51,980 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 09:26:51,980 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:26:51,997 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 09:26:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:26:52,001 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:52,002 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 09:26:52,002 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-03-20 09:26:52,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:52,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780401005] [2022-03-20 09:26:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:26:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:26:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 09:26:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:52,216 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 09:26:52,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:52,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780401005] [2022-03-20 09:26:52,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780401005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:26:52,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:26:52,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:26:52,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146242272] [2022-03-20 09:26:52,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:26:52,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:26:52,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:26:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:26:52,247 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 09:26:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:52,300 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-20 09:26:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:26:52,302 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 09:26:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:52,313 INFO L225 Difference]: With dead ends: 57 [2022-03-20 09:26:52,313 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 09:26:52,320 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 09:26:52,324 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 09:26:52,325 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 09:26:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 09:26:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 09:26:52,364 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 09:26:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 09:26:52,366 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 09:26:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:52,367 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 09:26:52,367 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 09:26:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 09:26:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:26:52,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:52,369 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 09:26:52,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:26:52,370 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:52,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-03-20 09:26:52,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:52,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073242105] [2022-03-20 09:26:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:52,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:52,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006103593] [2022-03-20 09:26:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:52,444 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 09:26:52,445 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 09:26:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 09:26:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:52,634 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 09:26:52,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:26:52,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:52,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073242105] [2022-03-20 09:26:52,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006103593] [2022-03-20 09:26:52,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006103593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:26:52,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:26:52,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:26:52,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658646025] [2022-03-20 09:26:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:26:52,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:26:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:52,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:26:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:26:52,648 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 09:26:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:52,724 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 09:26:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:26:52,724 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 09:26:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:52,725 INFO L225 Difference]: With dead ends: 39 [2022-03-20 09:26:52,726 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:26:52,726 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 09:26:52,727 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 09:26:52,727 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 09:26:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:26:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 09:26:52,732 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 09:26:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 09:26:52,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-20 09:26:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:52,734 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 09:26:52,734 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 09:26:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 09:26:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:26:52,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:52,735 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 09:26:52,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:26:52,947 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 09:26:52,948 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-03-20 09:26:52,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:52,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412412048] [2022-03-20 09:26:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:52,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940419502] [2022-03-20 09:26:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:52,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:52,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:52,964 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 09:26:52,995 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 09:26:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 09:26:53,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:53,160 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 09:26:53,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:26:53,262 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 09:26:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412412048] [2022-03-20 09:26:53,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940419502] [2022-03-20 09:26:53,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940419502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:26:53,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:26:53,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 09:26:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633075267] [2022-03-20 09:26:53,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:26:53,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:26:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:26:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:26:53,265 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 09:26:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:53,442 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 09:26:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 09:26:53,442 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 09:26:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:53,443 INFO L225 Difference]: With dead ends: 48 [2022-03-20 09:26:53,443 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 09:26:53,443 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 09:26:53,444 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:26:53,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:26:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 09:26:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 09:26:53,449 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 09:26:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 09:26:53,450 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-03-20 09:26:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:53,450 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 09:26:53,450 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 09:26:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 09:26:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:26:53,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:53,451 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 09:26:53,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 09:26:53,664 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 09:26:53,664 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-03-20 09:26:53,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:53,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664978964] [2022-03-20 09:26:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:53,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:53,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:53,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442514567] [2022-03-20 09:26:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:53,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:53,695 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 09:26:53,763 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 09:26:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:53,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:26:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:54,185 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 09:26:54,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:26:54,574 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 09:26:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664978964] [2022-03-20 09:26:54,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442514567] [2022-03-20 09:26:54,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442514567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:26:54,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:26:54,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 09:26:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254895204] [2022-03-20 09:26:54,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:26:54,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 09:26:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 09:26:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:26:54,576 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 09:26:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:55,027 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 09:26:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 09:26:55,027 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 09:26:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:55,028 INFO L225 Difference]: With dead ends: 60 [2022-03-20 09:26:55,028 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 09:26:55,029 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 09:26:55,029 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 09:26:55,029 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 09:26:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 09:26:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-03-20 09:26:55,034 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 09:26:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 09:26:55,035 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2022-03-20 09:26:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:55,035 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 09:26:55,035 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 09:26:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 09:26:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:26:55,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:26:55,036 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 09:26:55,054 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 09:26:55,247 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 09:26:55,247 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:26:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:26:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1381917339, now seen corresponding path program 1 times [2022-03-20 09:26:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:26:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000201589] [2022-03-20 09:26:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:26:55,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:26:55,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315336780] [2022-03-20 09:26:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:26:55,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:26:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:26:55,276 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 09:26:55,291 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 09:26:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:26:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:26:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:26:55,427 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:26:55,429 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:26:58,842 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 09:26:58,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:26:59,048 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 09:26:59,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:26:59,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000201589] [2022-03-20 09:26:59,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:26:59,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315336780] [2022-03-20 09:26:59,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315336780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:26:59,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:26:59,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 09:26:59,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238131185] [2022-03-20 09:26:59,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:26:59,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:26:59,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:26:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:26:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2022-03-20 09:26:59,050 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 09:27:01,065 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 09:27:05,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:27:07,115 WARN L534 Checker$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 09:27:09,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:27:11,196 WARN L534 Checker$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 09:27:13,209 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 09:27:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:15,303 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-03-20 09:27:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:27:15,303 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 09:27:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:15,304 INFO L225 Difference]: With dead ends: 56 [2022-03-20 09:27:15,304 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 09:27:15,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2022-03-20 09:27:15,305 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 09:27:15,305 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 09:27:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 09:27:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-20 09:27:15,314 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 09:27:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-20 09:27:15,315 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 48 [2022-03-20 09:27:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:15,315 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-20 09:27:15,315 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 09:27:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-20 09:27:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:27:15,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:27:15,316 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 09:27:15,334 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 09:27:15,517 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 09:27:15,517 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:27:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:27:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -137152858, now seen corresponding path program 1 times [2022-03-20 09:27:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:27:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136544640] [2022-03-20 09:27:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:27:15,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:27:15,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404230700] [2022-03-20 09:27:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:27:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:27:15,529 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 09:27:15,533 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 09:27:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:27:15,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:27:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:27:15,783 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 09:27:15,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:27:15,934 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 09:27:15,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:27:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136544640] [2022-03-20 09:27:15,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:27:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404230700] [2022-03-20 09:27:15,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404230700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:27:15,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:27:15,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 09:27:15,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90868944] [2022-03-20 09:27:15,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:27:15,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 09:27:15,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:27:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 09:27:15,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:27:15,936 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 09:27:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:16,067 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-03-20 09:27:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:27:16,067 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 09:27:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:16,068 INFO L225 Difference]: With dead ends: 65 [2022-03-20 09:27:16,068 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 09:27:16,068 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 09:27:16,069 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 09:27:16,070 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 09:27:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 09:27:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-03-20 09:27:16,078 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 09:27:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-20 09:27:16,079 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-03-20 09:27:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:16,079 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-20 09:27:16,080 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 09:27:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-20 09:27:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:27:16,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:27:16,081 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 09:27:16,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 09:27:16,300 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 09:27:16,300 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:27:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:27:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash -545218702, now seen corresponding path program 2 times [2022-03-20 09:27:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:27:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483386137] [2022-03-20 09:27:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:27:16,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:27:16,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700133623] [2022-03-20 09:27:16,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:27:16,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:27:16,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:27:16,315 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 09:27:16,315 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 09:27:16,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:27:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:27:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:27:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:27:16,552 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 09:27:16,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:27:16,713 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 09:27:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:27:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483386137] [2022-03-20 09:27:16,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:27:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700133623] [2022-03-20 09:27:16,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700133623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:27:16,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:27:16,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 09:27:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535615244] [2022-03-20 09:27:16,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:27:16,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:27:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:27:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:27:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:27:16,717 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 09:27:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:27:16,911 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-03-20 09:27:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:27:16,912 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 09:27:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:27:16,913 INFO L225 Difference]: With dead ends: 78 [2022-03-20 09:27:16,913 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 09:27:16,913 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 09:27:16,914 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 09:27:16,914 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 09:27:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 09:27:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-03-20 09:27:16,927 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 09:27:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-03-20 09:27:16,928 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-03-20 09:27:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:27:16,928 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-03-20 09:27:16,928 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 09:27:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-03-20 09:27:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:27:16,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:27:16,929 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 09:27:16,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 09:27:17,150 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 09:27:17,151 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:27:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:27:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 494880272, now seen corresponding path program 3 times [2022-03-20 09:27:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:27:17,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274814175] [2022-03-20 09:27:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:27:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:27:17,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:27:17,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213131971] [2022-03-20 09:27:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:27:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:27:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:27:17,160 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 09:27:17,161 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 09:27:17,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 09:27:17,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:27:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:27:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:27:19,092 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:19,096 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:19,097 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:27:51,236 WARN L232 SmtUtils]: Spent 8.88s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:27:57,810 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 09:27:57,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:28:04,254 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:28:08,171 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:28:26,430 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 09:28:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:28:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274814175] [2022-03-20 09:28:26,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:28:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213131971] [2022-03-20 09:28:26,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213131971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:28:26,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:28:26,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 09:28:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84471016] [2022-03-20 09:28:26,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:28:26,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 09:28:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:28:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 09:28:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=490, Unknown=12, NotChecked=0, Total=600 [2022-03-20 09:28:26,432 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 09:28:39,728 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* 2 c_main_~Y~0))) (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (<= c_main_~X~0 50) (< c_main_~v~0 .cse7) (<= c_main_~Y~0 50) (= (+ (* 2 (* c_main_~x~0 c_main_~y~0)) c_main_~v~0 c_main_~X~0) (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~y~0) .cse7)) (<= 0 c_main_~Y~0))) is different from false [2022-03-20 09:28:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:28:39,836 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-20 09:28:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:28:39,836 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 09:28:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:28:39,836 INFO L225 Difference]: With dead ends: 62 [2022-03-20 09:28:39,836 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:28:39,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=228, Invalid=1023, Unknown=13, NotChecked=68, Total=1332 [2022-03-20 09:28:39,838 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 09:28:39,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 217 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 42 Unchecked, 0.8s Time] [2022-03-20 09:28:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:28:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:28:39,838 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 09:28:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:28:39,839 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-03-20 09:28:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:28:39,839 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:28:39,839 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 09:28:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:28:39,839 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:28:39,841 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:28:39,847 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 09:28:40,047 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 09:28:40,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:29:15,330 WARN L232 SmtUtils]: Spent 35.23s on a formula simplification. DAG size of input: 114 DAG size of output: 38 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:29:37,984 WARN L232 SmtUtils]: Spent 22.63s 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 09:29:38,424 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 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:29:38,425 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-20 09:29:38,425 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 50)) [2022-03-20 09:29:38,425 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-20 09:29:38,425 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 main_~X~0))) (and (or .cse0 (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))) (or .cse0 (forall ((main_~Y~0 Int)) (= (* 2 (* main_~y~0 main_~x~0)) (+ (* (* main_~X~0 main_~y~0) 2) (* main_~y~0 2))))) (= (+ (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= main_~Y~0 50) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 50))) [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:29:38,426 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)) (<= main_~Y~0 50) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 50) (or (= (+ .cse0 (* main_~y~0 2) .cse4) (+ (* 2 (* main_~y~0 main_~x~0)) .cse2)) .cse3))) [2022-03-20 09:29:38,426 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 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-20 09:29:38,426 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:29:38,429 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-20 09:29:38,430 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:29:38,434 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,434 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,438 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,439 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:29:38 BasicIcfg [2022-03-20 09:29:38,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:29:38,440 INFO L158 Benchmark]: Toolchain (without parser) took 167076.91ms. Allocated memory was 210.8MB in the beginning and 282.1MB in the end (delta: 71.3MB). Free memory was 156.5MB in the beginning and 139.7MB in the end (delta: 16.8MB). Peak memory consumption was 89.1MB. Max. memory is 8.0GB. [2022-03-20 09:29:38,440 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 210.8MB. Free memory is still 172.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:29:38,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.75ms. Allocated memory was 210.8MB in the beginning and 282.1MB in the end (delta: 71.3MB). Free memory was 156.3MB in the beginning and 256.0MB in the end (delta: -99.7MB). Peak memory consumption was 7.0MB. Max. memory is 8.0GB. [2022-03-20 09:29:38,440 INFO L158 Benchmark]: Boogie Preprocessor took 19.84ms. Allocated memory is still 282.1MB. Free memory was 256.0MB in the beginning and 254.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:29:38,440 INFO L158 Benchmark]: RCFGBuilder took 285.27ms. Allocated memory is still 282.1MB. Free memory was 254.6MB in the beginning and 243.1MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 09:29:38,440 INFO L158 Benchmark]: IcfgTransformer took 38.11ms. Allocated memory is still 282.1MB. Free memory was 243.1MB in the beginning and 242.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:29:38,441 INFO L158 Benchmark]: TraceAbstraction took 166552.44ms. Allocated memory is still 282.1MB. Free memory was 241.4MB in the beginning and 139.7MB in the end (delta: 101.7MB). Peak memory consumption was 102.8MB. Max. memory is 8.0GB. [2022-03-20 09:29:38,441 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 210.8MB. Free memory is still 172.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.75ms. Allocated memory was 210.8MB in the beginning and 282.1MB in the end (delta: 71.3MB). Free memory was 156.3MB in the beginning and 256.0MB in the end (delta: -99.7MB). Peak memory consumption was 7.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.84ms. Allocated memory is still 282.1MB. Free memory was 256.0MB in the beginning and 254.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 285.27ms. Allocated memory is still 282.1MB. Free memory was 254.6MB in the beginning and 243.1MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 38.11ms. Allocated memory is still 282.1MB. Free memory was 243.1MB in the beginning and 242.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 166552.44ms. Allocated memory is still 282.1MB. Free memory was 241.4MB in the beginning and 139.7MB in the end (delta: 101.7MB). Peak memory consumption was 102.8MB. 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: 166.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 58.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 13.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 1407 SdHoareTripleChecker+Invalid, 13.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 106 IncrementalHoareTripleChecker+Unchecked, 1215 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1168 IncrementalHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 192 mSDtfsCounter, 1168 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 632 GetRequests, 492 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 67.9s 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, 259 HoareAnnotationTreeSize, 29 FomulaSimplifications, 792 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4678 FormulaSimplificationTreeSizeReductionInter, 58.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 74.7s 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 09:29:38,445 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,445 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,446 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:29:38,446 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] Derived loop invariant: (((((((x <= X || (forall main_~y~0 : int :: 2 * (main_~y~0 * x) + X + v == main_~y~0 * 2 + Y * 2 + 2 * (Y * x))) || !(X == 0)) && (x <= X || (forall main_~Y~0 : int :: 2 * (y * x) == X * y * 2 + y * 2))) && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && Y <= 50) && 0 <= Y) && 0 <= X) && X <= 50 RESULT: Ultimate proved your program to be correct! [2022-03-20 09:29:38,587 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...