/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:07:38,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:07:38,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:07:38,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:07:38,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:07:38,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:07:38,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:07:38,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:07:38,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:07:38,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:07:38,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:07:38,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:07:38,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:07:38,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:07:38,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:07:38,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:07:38,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:07:38,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:07:38,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:07:38,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:07:38,627 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:07:38,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:07:38,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:07:38,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:07:38,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:07:38,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 13:07:38,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:07:38,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:07:38,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:07:38,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:07:38,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:07:38,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:07:38,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:07:38,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:07:38,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:07:38,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:07:38,675 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:07:38,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:07:38,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:07:38,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:07:38,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:07:38,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:07:38,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:07:38,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:07:38,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:07:38,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:07:38,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:07:38,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:07:38,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:07:38,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:07:38,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:07:38,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:07:38,680 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:07:38,680 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:07:38,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:07:38,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:07:38,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:07:38,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:07:38,922 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:07:38,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-04-06 13:07:38,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f54df47a/9816c760468b4444b69321a8488f6ea9/FLAG7c2657220 [2022-04-06 13:07:39,328 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:07:39,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-04-06 13:07:39,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f54df47a/9816c760468b4444b69321a8488f6ea9/FLAG7c2657220 [2022-04-06 13:07:39,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f54df47a/9816c760468b4444b69321a8488f6ea9 [2022-04-06 13:07:39,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:07:39,345 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:07:39,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:07:39,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:07:39,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:07:39,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a302ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39, skipping insertion in model container [2022-04-06 13:07:39,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:07:39,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:07:39,518 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-04-06 13:07:39,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:07:39,534 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:07:39,544 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-04-06 13:07:39,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:07:39,557 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:07:39,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39 WrapperNode [2022-04-06 13:07:39,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:07:39,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:07:39,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:07:39,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:07:39,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:07:39,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:07:39,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:07:39,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:07:39,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:07:39,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:39,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 13:07:39,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 13:07:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:07:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:07:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:07:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 13:07:39,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 13:07:39,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:07:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:07:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:07:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:07:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:07:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:07:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:07:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:07:39,717 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:07:39,718 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:07:39,842 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:07:39,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:07:39,850 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:07:39,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:07:39 BoogieIcfgContainer [2022-04-06 13:07:39,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:07:39,852 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:07:39,852 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:07:39,853 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:07:39,855 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:07:39" (1/1) ... [2022-04-06 13:07:39,857 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:07:39,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:07:39 BasicIcfg [2022-04-06 13:07:39,875 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:07:39,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:07:39,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:07:39,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:07:39,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:07:39" (1/4) ... [2022-04-06 13:07:39,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5e6b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:07:39, skipping insertion in model container [2022-04-06 13:07:39,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:39" (2/4) ... [2022-04-06 13:07:39,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5e6b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:07:39, skipping insertion in model container [2022-04-06 13:07:39,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:07:39" (3/4) ... [2022-04-06 13:07:39,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5e6b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:07:39, skipping insertion in model container [2022-04-06 13:07:39,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:07:39" (4/4) ... [2022-04-06 13:07:39,886 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.cqvasr [2022-04-06 13:07:39,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:07:39,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:07:39,929 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:07:39,934 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 13:07:39,934 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:07:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 13:07:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:07:39,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:39,951 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:39,952 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-04-06 13:07:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:39,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494007675] [2022-04-06 13:07:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:07:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 13:07:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 13:07:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 13:07:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:40,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494007675] [2022-04-06 13:07:40,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494007675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:07:40,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:07:40,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 13:07:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642021539] [2022-04-06 13:07:40,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:40,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 13:07:40,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 13:07:40,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:07:40,169 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:07:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:40,223 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-04-06 13:07:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 13:07:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 13:07:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:40,230 INFO L225 Difference]: With dead ends: 57 [2022-04-06 13:07:40,230 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 13:07:40,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:07:40,235 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:40,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:07:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 13:07:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 13:07:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 13:07:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 13:07:40,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-04-06 13:07:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:40,269 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 13:07:40,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:07:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 13:07:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:07:40,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:40,271 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:40,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:07:40,271 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-04-06 13:07:40,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:40,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534491992] [2022-04-06 13:07:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:40,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:40,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:40,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693640235] [2022-04-06 13:07:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:40,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:40,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:40,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:40,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 13:07:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 13:07:40,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:40,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:07:40,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:40,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534491992] [2022-04-06 13:07:40,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:40,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693640235] [2022-04-06 13:07:40,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693640235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:07:40,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:07:40,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 13:07:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641869083] [2022-04-06 13:07:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:40,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:07:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:07:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:07:40,523 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 13:07:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:40,581 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-04-06 13:07:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:07:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 13:07:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:40,583 INFO L225 Difference]: With dead ends: 39 [2022-04-06 13:07:40,583 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 13:07:40,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:07:40,584 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:40,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:07:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 13:07:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-04-06 13:07:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:07:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-06 13:07:40,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-04-06 13:07:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:40,594 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-06 13:07:40,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 13:07:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-06 13:07:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:07:40,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:40,596 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:40,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 13:07:40,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:40,810 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-04-06 13:07:40,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:40,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522261017] [2022-04-06 13:07:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:40,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:40,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:40,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371262655] [2022-04-06 13:07:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:40,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:40,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:40,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:40,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 13:07:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:40,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:07:40,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:07:40,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:07:40,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522261017] [2022-04-06 13:07:40,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371262655] [2022-04-06 13:07:40,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371262655] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:07:40,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:07:40,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 13:07:40,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638525126] [2022-04-06 13:07:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:40,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 13:07:40,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 13:07:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:07:40,997 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 13:07:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:41,051 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-04-06 13:07:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 13:07:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 13:07:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:41,053 INFO L225 Difference]: With dead ends: 43 [2022-04-06 13:07:41,053 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 13:07:41,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:07:41,054 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:41,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:07:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 13:07:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-04-06 13:07:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:07:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 13:07:41,060 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-04-06 13:07:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:41,061 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 13:07:41,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 13:07:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 13:07:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 13:07:41,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:41,062 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:41,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 13:07:41,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 13:07:41,288 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-04-06 13:07:41,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:41,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575845023] [2022-04-06 13:07:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:41,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:41,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089224483] [2022-04-06 13:07:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:41,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:41,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:41,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 13:07:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 13:07:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:46,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:07:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:54,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:54,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575845023] [2022-04-06 13:07:54,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:54,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089224483] [2022-04-06 13:07:54,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089224483] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 13:07:54,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:07:54,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-04-06 13:07:54,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914512109] [2022-04-06 13:07:54,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:54,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 13:07:54,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 13:07:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=80, Unknown=2, NotChecked=0, Total=110 [2022-04-06 13:07:54,654 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 13:07:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:55,396 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-04-06 13:07:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 13:07:55,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-04-06 13:07:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:55,398 INFO L225 Difference]: With dead ends: 47 [2022-04-06 13:07:55,398 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 13:07:55,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2022-04-06 13:07:55,399 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:55,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 13:07:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 13:07:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-04-06 13:07:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 13:07:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-04-06 13:07:55,407 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 37 [2022-04-06 13:07:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:55,407 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-04-06 13:07:55,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 13:07:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-04-06 13:07:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 13:07:55,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:55,408 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:55,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 13:07:55,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:55,609 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-04-06 13:07:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:55,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606037621] [2022-04-06 13:07:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:55,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:55,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:55,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116753878] [2022-04-06 13:07:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:55,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:55,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:55,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 13:07:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:55,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 13:07:55,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:07:56,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:07:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:07:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606037621] [2022-04-06 13:07:57,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:57,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116753878] [2022-04-06 13:07:57,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116753878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:07:57,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:07:57,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-06 13:07:57,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068811121] [2022-04-06 13:07:57,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:07:57,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 13:07:57,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 13:07:57,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:07:57,796 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 13:07:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:59,053 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2022-04-06 13:07:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 13:07:59,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-04-06 13:07:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:59,058 INFO L225 Difference]: With dead ends: 68 [2022-04-06 13:07:59,059 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 13:07:59,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-06 13:07:59,060 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:59,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 105 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 13:07:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 13:07:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 13:07:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 13:07:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-04-06 13:07:59,071 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 37 [2022-04-06 13:07:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:59,071 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-04-06 13:07:59,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 13:07:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-04-06 13:07:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 13:07:59,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:59,073 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:59,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 13:07:59,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:59,288 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-04-06 13:07:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772230345] [2022-04-06 13:07:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:59,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:59,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366134582] [2022-04-06 13:07:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:59,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:59,301 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) [2022-04-06 13:07:59,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 13:07:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 13:07:59,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 13:07:59,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:07:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 13:07:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:59,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772230345] [2022-04-06 13:07:59,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:59,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366134582] [2022-04-06 13:07:59,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366134582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:07:59,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:07:59,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 13:07:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731203649] [2022-04-06 13:07:59,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:07:59,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 13:07:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 13:07:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 13:07:59,612 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 13:08:01,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:01,746 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-04-06 13:08:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 13:08:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-04-06 13:08:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:01,747 INFO L225 Difference]: With dead ends: 68 [2022-04-06 13:08:01,747 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 13:08:01,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:08:01,749 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:01,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 117 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 13:08:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 13:08:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 13:08:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 13:08:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-04-06 13:08:01,759 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 43 [2022-04-06 13:08:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:01,759 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-04-06 13:08:01,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 13:08:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-04-06 13:08:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 13:08:01,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:01,771 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-04-06 13:08:01,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:01,972 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 [2022-04-06 13:08:01,972 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1353204359, now seen corresponding path program 1 times [2022-04-06 13:08:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:01,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524261757] [2022-04-06 13:08:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:01,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:01,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712771473] [2022-04-06 13:08:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:01,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:01,992 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) [2022-04-06 13:08:01,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 13:08:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 13:08:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:02,406 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 13:08:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 13:08:04,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:06,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:06,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524261757] [2022-04-06 13:08:06,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:06,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712771473] [2022-04-06 13:08:06,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712771473] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:08:06,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:08:06,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 13:08:06,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595247138] [2022-04-06 13:08:06,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:06,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 13:08:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 13:08:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-04-06 13:08:06,900 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 13:08:09,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:11,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:14,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:16,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:17,161 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-04-06 13:08:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 13:08:17,162 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-04-06 13:08:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:17,163 INFO L225 Difference]: With dead ends: 88 [2022-04-06 13:08:17,163 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 13:08:17,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-04-06 13:08:17,165 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:17,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 213 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 4 Unknown, 0 Unchecked, 9.9s Time] [2022-04-06 13:08:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 13:08:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-04-06 13:08:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 13:08:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-04-06 13:08:17,178 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 46 [2022-04-06 13:08:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:17,178 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-04-06 13:08:17,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 13:08:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-04-06 13:08:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 13:08:17,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:17,180 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:17,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 13:08:17,399 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 [2022-04-06 13:08:17,400 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 2 times [2022-04-06 13:08:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797479222] [2022-04-06 13:08:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:17,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:17,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269963411] [2022-04-06 13:08:17,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:08:17,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:17,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:17,434 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) [2022-04-06 13:08:17,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 13:08:17,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:08:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:08:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 13:08:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 13:08:27,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 13:08:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797479222] [2022-04-06 13:08:43,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269963411] [2022-04-06 13:08:43,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269963411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:08:43,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:08:43,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2022-04-06 13:08:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68970991] [2022-04-06 13:08:43,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:43,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 13:08:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 13:08:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=338, Unknown=2, NotChecked=0, Total=420 [2022-04-06 13:08:43,466 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 13:08:48,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:59,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:03,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:09:10,016 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-04-06 13:09:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 13:09:10,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2022-04-06 13:09:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:09:10,018 INFO L225 Difference]: With dead ends: 107 [2022-04-06 13:09:10,018 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 13:09:10,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=157, Invalid=652, Unknown=3, NotChecked=0, Total=812 [2022-04-06 13:09:10,020 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:09:10,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 361 Invalid, 2 Unknown, 32 Unchecked, 11.2s Time] [2022-04-06 13:09:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 13:09:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2022-04-06 13:09:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 13:09:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-04-06 13:09:10,029 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2022-04-06 13:09:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:09:10,029 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-04-06 13:09:10,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 13:09:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-04-06 13:09:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 13:09:10,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:09:10,034 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:09:10,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 13:09:10,235 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 [2022-04-06 13:09:10,235 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:09:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:09:10,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2101955993, now seen corresponding path program 3 times [2022-04-06 13:09:10,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:09:10,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749941323] [2022-04-06 13:09:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:09:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:09:10,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:09:10,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978886376] [2022-04-06 13:09:10,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 13:09:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:09:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:09:10,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:09:10,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 13:09:10,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 13:09:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:09:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 13:09:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:09:11,925 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 13:09:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 13:09:14,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:09:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 13:09:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:09:19,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749941323] [2022-04-06 13:09:19,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:09:19,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978886376] [2022-04-06 13:09:19,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978886376] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:09:19,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:09:19,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 33 [2022-04-06 13:09:19,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597716318] [2022-04-06 13:09:19,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:09:19,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 13:09:19,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:09:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 13:09:19,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=851, Unknown=2, NotChecked=0, Total=1056 [2022-04-06 13:09:19,965 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 13:09:22,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:27,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:29,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:31,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:36,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:37,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:50,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:56,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:09:57,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:10:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:10:00,064 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2022-04-06 13:10:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 13:10:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 64 [2022-04-06 13:10:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:10:00,065 INFO L225 Difference]: With dead ends: 113 [2022-04-06 13:10:00,065 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 13:10:00,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=510, Invalid=1937, Unknown=3, NotChecked=0, Total=2450 [2022-04-06 13:10:00,068 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 78 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:10:00,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 213 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 414 Invalid, 3 Unknown, 28 Unchecked, 23.1s Time] [2022-04-06 13:10:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 13:10:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 13:10:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 13:10:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 13:10:00,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-04-06 13:10:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:10:00,069 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 13:10:00,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 13:10:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 13:10:00,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 13:10:00,072 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 13:10:00,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 13:10:00,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 13:10:00,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 13:10:05,801 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|)) [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 13:10:05,802 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-04-06 13:10:05,802 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-04-06 13:10:05,802 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-06 13:10:05,802 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-06 13:10:05,803 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 20) (<= 0 main_~b~0)) [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (and (<= 0 main_~y~0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 20) (<= 1 main_~b~0)) [2022-04-06 13:10:05,803 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 1 main_~b~0))) [2022-04-06 13:10:05,803 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~y~0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 20) (<= 1 main_~b~0)) [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L882 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-04-06 13:10:05,803 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-04-06 13:10:05,804 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-04-06 13:10:05,804 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-04-06 13:10:05,804 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-04-06 13:10:05,804 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-04-06 13:10:05,804 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-04-06 13:10:05,806 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-04-06 13:10:05,807 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 13:10:05,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:10:05 BasicIcfg [2022-04-06 13:10:05,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 13:10:05,818 INFO L158 Benchmark]: Toolchain (without parser) took 146473.29ms. Allocated memory was 196.1MB in the beginning and 243.3MB in the end (delta: 47.2MB). Free memory was 143.9MB in the beginning and 199.4MB in the end (delta: -55.5MB). Peak memory consumption was 109.9MB. Max. memory is 8.0GB. [2022-04-06 13:10:05,819 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 196.1MB. Free memory was 159.9MB in the beginning and 159.8MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 13:10:05,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.34ms. Allocated memory was 196.1MB in the beginning and 243.3MB in the end (delta: 47.2MB). Free memory was 143.6MB in the beginning and 221.0MB in the end (delta: -77.4MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2022-04-06 13:10:05,819 INFO L158 Benchmark]: Boogie Preprocessor took 25.84ms. Allocated memory is still 243.3MB. Free memory was 221.0MB in the beginning and 219.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 13:10:05,819 INFO L158 Benchmark]: RCFGBuilder took 267.14ms. Allocated memory is still 243.3MB. Free memory was 219.4MB in the beginning and 208.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 13:10:05,820 INFO L158 Benchmark]: IcfgTransformer took 22.50ms. Allocated memory is still 243.3MB. Free memory was 208.9MB in the beginning and 207.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 13:10:05,820 INFO L158 Benchmark]: TraceAbstraction took 145942.02ms. Allocated memory is still 243.3MB. Free memory was 207.3MB in the beginning and 199.4MB in the end (delta: 8.0MB). Peak memory consumption was 126.5MB. Max. memory is 8.0GB. [2022-04-06 13:10:05,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 196.1MB. Free memory was 159.9MB in the beginning and 159.8MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.34ms. Allocated memory was 196.1MB in the beginning and 243.3MB in the end (delta: 47.2MB). Free memory was 143.6MB in the beginning and 221.0MB in the end (delta: -77.4MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.84ms. Allocated memory is still 243.3MB. Free memory was 221.0MB in the beginning and 219.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 267.14ms. Allocated memory is still 243.3MB. Free memory was 219.4MB in the beginning and 208.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.50ms. Allocated memory is still 243.3MB. Free memory was 208.9MB in the beginning and 207.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 145942.02ms. Allocated memory is still 243.3MB. Free memory was 207.3MB in the beginning and 199.4MB in the end (delta: 8.0MB). Peak memory consumption was 126.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 145.9s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 81.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 262 SdHoareTripleChecker+Valid, 47.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 1176 SdHoareTripleChecker+Invalid, 47.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60 IncrementalHoareTripleChecker+Unchecked, 952 mSDsCounter, 172 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1482 IncrementalHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 172 mSolverCounterUnsat, 224 mSDtfsCounter, 1482 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 641 GetRequests, 478 SyntacticMatches, 14 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 69.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=8, InterpolantAutomatonStates: 105, 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, 9 MinimizatonAttempts, 40 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 36 PreInvPairs, 67 NumberOfFragments, 77 HoareAnnotationTreeSize, 36 FomulaSimplifications, 229 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2457 FormulaSimplificationTreeSizeReductionInter, 5.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 56.5s InterpolantComputationTime, 372 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 594 ConstructedInterpolants, 4 QuantifiedInterpolants, 3903 SizeOfPredicates, 29 NumberOfNonLiveVariables, 964 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 326/443 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((0 <= y && z + y * x == b * a) && b <= 20) && 1 <= b RESULT: Ultimate proved your program to be correct! [2022-04-06 13:10:05,870 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...