/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/cohendiv-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:05:16,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:05:16,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:05:16,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:05:16,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:05:16,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:05:16,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:05:16,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:05:16,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:05:16,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:05:16,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:05:16,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:05:16,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:05:16,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:05:16,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:05:16,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:05:16,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:05:16,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:05:16,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:05:16,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:05:16,626 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:05:16,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:05:16,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:05:16,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:05:16,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:05:16,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:05:16,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:05:16,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:05:16,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:05:16,648 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 11:05:16,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:05:16,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:05:16,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:05:16,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:05:16,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:05:16,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:05:16,669 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:05:16,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:05:16,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:05:16,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:05:16,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:05:16,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:05:16,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:05:16,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:05:16,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:05:16,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:05:16,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:05:16,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:05:16,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:05:16,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:05:16,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:05:16,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:05:16,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:05:16,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:05:16,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:05:16,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:05:16,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:05:16,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:05:16,673 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:05:16,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:05:16,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:05:16,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:05:16,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:05:16,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:05:16,942 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:05:16,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2022-04-06 11:05:17,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/110b6330e/19e60f7adeb5444fafff378c68f267c3/FLAGfa1213ba3 [2022-04-06 11:05:17,358 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:05:17,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2022-04-06 11:05:17,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/110b6330e/19e60f7adeb5444fafff378c68f267c3/FLAGfa1213ba3 [2022-04-06 11:05:17,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/110b6330e/19e60f7adeb5444fafff378c68f267c3 [2022-04-06 11:05:17,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:05:17,765 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:05:17,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:05:17,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:05:17,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:05:17,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ed319d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17, skipping insertion in model container [2022-04-06 11:05:17,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:05:17,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:05:17,922 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/cohendiv-ll_unwindbound2.c[576,589] [2022-04-06 11:05:17,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:05:17,941 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:05:17,949 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/cohendiv-ll_unwindbound2.c[576,589] [2022-04-06 11:05:17,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:05:17,964 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:05:17,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17 WrapperNode [2022-04-06 11:05:17,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:05:17,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:05:17,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:05:17,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:05:17,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:05:17,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:05:17,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:05:17,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:05:17,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (1/1) ... [2022-04-06 11:05:17,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:05:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:18,010 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 11:05:18,012 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 11:05:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:05:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:05:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:05:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:05:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:05:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:05:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:05:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:05:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:05:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:05:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:05:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:05:18,084 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:05:18,086 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:05:18,190 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:05:18,194 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:05:18,194 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 11:05:18,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:05:18 BoogieIcfgContainer [2022-04-06 11:05:18,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:05:18,197 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:05:18,197 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:05:18,198 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:05:18,200 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:05:18" (1/1) ... [2022-04-06 11:05:18,201 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:05:18,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:05:18 BasicIcfg [2022-04-06 11:05:18,217 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:05:18,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:05:18,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:05:18,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:05:18,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:05:17" (1/4) ... [2022-04-06 11:05:18,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155af2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:05:18, skipping insertion in model container [2022-04-06 11:05:18,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:05:17" (2/4) ... [2022-04-06 11:05:18,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155af2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:05:18, skipping insertion in model container [2022-04-06 11:05:18,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:05:18" (3/4) ... [2022-04-06 11:05:18,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155af2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:05:18, skipping insertion in model container [2022-04-06 11:05:18,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:05:18" (4/4) ... [2022-04-06 11:05:18,224 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound2.cqvasr [2022-04-06 11:05:18,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:05:18,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:05:18,262 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:05:18,267 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 11:05:18,268 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:05:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:05:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 11:05:18,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:18,288 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:05:18,288 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-04-06 11:05:18,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:18,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196744579] [2022-04-06 11:05:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:18,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:18,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:05:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:05:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:05:18,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:18,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196744579] [2022-04-06 11:05:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196744579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:18,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:18,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:05:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516162474] [2022-04-06 11:05:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:18,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:05:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:05:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:05:18,473 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:05:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:18,552 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-04-06 11:05:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:05:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 11:05:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:18,560 INFO L225 Difference]: With dead ends: 68 [2022-04-06 11:05:18,561 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 11:05:18,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 11:05:18,566 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:18,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:05:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 11:05:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 11:05:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 11:05:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-04-06 11:05:18,598 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-04-06 11:05:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:18,598 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-04-06 11:05:18,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:05:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-04-06 11:05:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 11:05:18,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:18,600 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:05:18,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:05:18,600 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-04-06 11:05:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:18,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541181310] [2022-04-06 11:05:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:18,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329370520] [2022-04-06 11:05:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:18,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:18,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:18,644 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 11:05:18,646 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 11:05:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:05:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:05:18,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:05:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541181310] [2022-04-06 11:05:18,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329370520] [2022-04-06 11:05:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329370520] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:18,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:18,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 11:05:18,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086606414] [2022-04-06 11:05:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:18,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 11:05:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 11:05:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:05:18,818 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:05:18,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:18,848 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-06 11:05:18,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 11:05:18,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 11:05:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:18,849 INFO L225 Difference]: With dead ends: 42 [2022-04-06 11:05:18,849 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 11:05:18,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:05:18,851 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:18,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:05:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 11:05:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 11:05:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 11:05:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 11:05:18,858 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-04-06 11:05:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:18,859 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 11:05:18,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:05:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 11:05:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 11:05:18,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:18,860 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:05:18,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 11:05:19,069 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 11:05:19,070 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-04-06 11:05:19,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:19,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902952003] [2022-04-06 11:05:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:19,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:19,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739973619] [2022-04-06 11:05:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:19,093 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 11:05:19,113 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 11:05:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:19,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:05:19,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:05:19,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:05:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902952003] [2022-04-06 11:05:19,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739973619] [2022-04-06 11:05:19,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739973619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:19,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:19,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:05:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993142400] [2022-04-06 11:05:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:19,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:05:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:05:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:05:19,267 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:05:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:19,326 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-04-06 11:05:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:05:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 11:05:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:19,328 INFO L225 Difference]: With dead ends: 45 [2022-04-06 11:05:19,328 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 11:05:19,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 11:05:19,329 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:19,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 145 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:05:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 11:05:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-06 11:05:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 11:05:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-06 11:05:19,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-04-06 11:05:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:19,339 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-06 11:05:19,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:05:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-06 11:05:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 11:05:19,340 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:19,340 INFO L499 BasicCegarLoop]: trace histogram [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 11:05:19,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 11:05:19,555 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 11:05:19,556 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-04-06 11:05:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:19,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130613578] [2022-04-06 11:05:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:19,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:19,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508804789] [2022-04-06 11:05:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:19,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:19,577 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 11:05:19,580 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 11:05:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:05:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:05:19,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:05:19,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130613578] [2022-04-06 11:05:19,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508804789] [2022-04-06 11:05:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508804789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:19,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:19,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:05:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131119305] [2022-04-06 11:05:19,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:19,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:05:19,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:05:19,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:05:19,699 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:05:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:19,751 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-04-06 11:05:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:05:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 11:05:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:19,753 INFO L225 Difference]: With dead ends: 58 [2022-04-06 11:05:19,753 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 11:05:19,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 11:05:19,755 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:19,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 139 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:05:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 11:05:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 11:05:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:05:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-04-06 11:05:19,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-04-06 11:05:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:19,765 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-04-06 11:05:19,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:05:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-04-06 11:05:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 11:05:19,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:19,767 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 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 11:05:19,790 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 11:05:19,979 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 11:05:19,980 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-04-06 11:05:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337247429] [2022-04-06 11:05:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:19,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868810475] [2022-04-06 11:05:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:19,994 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 11:05:19,997 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 11:05:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:05:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:05:20,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:05:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:20,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337247429] [2022-04-06 11:05:20,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868810475] [2022-04-06 11:05:20,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868810475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:20,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:20,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:05:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432878694] [2022-04-06 11:05:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:20,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:05:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:05:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:05:20,135 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 11:05:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:20,202 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-04-06 11:05:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:05:20,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 31 [2022-04-06 11:05:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:20,204 INFO L225 Difference]: With dead ends: 83 [2022-04-06 11:05:20,204 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 11:05:20,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 11:05:20,206 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:20,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:05:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 11:05:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-04-06 11:05:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 11:05:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-04-06 11:05:20,219 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-04-06 11:05:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:20,219 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-04-06 11:05:20,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 11:05:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-04-06 11:05:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 11:05:20,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:20,220 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-04-06 11:05:20,247 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 11:05:20,435 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 11:05:20,436 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-04-06 11:05:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:20,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600330355] [2022-04-06 11:05:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:20,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153400094] [2022-04-06 11:05:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:20,459 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 11:05:20,464 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 11:05:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:20,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:05:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:05:20,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:05:20,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600330355] [2022-04-06 11:05:20,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153400094] [2022-04-06 11:05:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153400094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:20,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:20,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:05:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698842905] [2022-04-06 11:05:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:20,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:05:20,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:05:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:05:20,590 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 11:05:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:20,616 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-04-06 11:05:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:05:20,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-04-06 11:05:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:20,627 INFO L225 Difference]: With dead ends: 113 [2022-04-06 11:05:20,627 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 11:05:20,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:05:20,632 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:20,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:05:20,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 11:05:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 11:05:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 11:05:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-04-06 11:05:20,645 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-04-06 11:05:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:20,646 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-04-06 11:05:20,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 11:05:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-04-06 11:05:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 11:05:20,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:20,647 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 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 11:05:20,671 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 11:05:20,847 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 11:05:20,848 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-04-06 11:05:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657310189] [2022-04-06 11:05:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:20,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:20,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589844084] [2022-04-06 11:05:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:20,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:20,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:20,876 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 11:05:20,886 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 11:05:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:20,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:05:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:05:21,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:05:21,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:21,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657310189] [2022-04-06 11:05:21,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:21,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589844084] [2022-04-06 11:05:21,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589844084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:05:21,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:05:21,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 11:05:21,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518416890] [2022-04-06 11:05:21,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:05:21,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:05:21,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:21,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:05:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:05:21,036 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 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 11:05:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:21,119 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-04-06 11:05:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:05:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 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 41 [2022-04-06 11:05:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:21,121 INFO L225 Difference]: With dead ends: 84 [2022-04-06 11:05:21,121 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 11:05:21,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:05:21,125 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:21,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 167 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:05:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 11:05:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 11:05:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 11:05:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-04-06 11:05:21,138 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-04-06 11:05:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:21,139 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-04-06 11:05:21,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 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 11:05:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-04-06 11:05:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:05:21,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:21,140 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:05:21,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:05:21,340 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 11:05:21,341 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-04-06 11:05:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:21,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627593305] [2022-04-06 11:05:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:21,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:21,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:21,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650351218] [2022-04-06 11:05:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:21,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:21,362 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 11:05:21,363 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 11:05:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:05:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 11:05:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:05:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 11:05:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627593305] [2022-04-06 11:05:21,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650351218] [2022-04-06 11:05:21,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650351218] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:05:21,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:05:21,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 11:05:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588372019] [2022-04-06 11:05:21,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:05:21,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:05:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:05:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:05:21,787 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 11:05:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:21,904 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-04-06 11:05:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 11:05:21,905 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-04-06 11:05:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:21,906 INFO L225 Difference]: With dead ends: 88 [2022-04-06 11:05:21,906 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 11:05:21,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:05:21,907 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:21,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 116 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:05:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 11:05:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 11:05:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 11:05:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-04-06 11:05:21,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-04-06 11:05:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:21,918 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-04-06 11:05:21,918 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 11:05:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-04-06 11:05:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 11:05:21,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:21,919 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:05:21,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:05:22,127 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 11:05:22,128 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-04-06 11:05:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:22,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609055010] [2022-04-06 11:05:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:22,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:22,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621236813] [2022-04-06 11:05:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:22,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:22,139 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 11:05:22,151 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 11:05:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:22,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 11:05:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 11:05:22,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:05:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609055010] [2022-04-06 11:05:22,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621236813] [2022-04-06 11:05:22,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621236813] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:05:22,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:05:22,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 11:05:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100527612] [2022-04-06 11:05:22,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:05:22,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:05:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:05:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:05:22,703 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 11:05:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:22,868 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2022-04-06 11:05:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:05:22,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2022-04-06 11:05:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:22,872 INFO L225 Difference]: With dead ends: 147 [2022-04-06 11:05:22,872 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 11:05:22,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-04-06 11:05:22,877 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:22,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 146 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:05:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 11:05:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-04-06 11:05:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 58 states have internal predecessors, (66), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 11:05:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-04-06 11:05:22,901 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-04-06 11:05:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:22,901 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-04-06 11:05:22,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 11:05:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-04-06 11:05:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 11:05:22,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:05:22,907 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:05:22,932 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 11:05:23,130 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 11:05:23,130 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:05:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:05:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2022-04-06 11:05:23,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:05:23,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473261532] [2022-04-06 11:05:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:05:23,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:05:23,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956886281] [2022-04-06 11:05:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:05:23,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:05:23,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:05:23,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:05:23,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:05:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:05:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 11:05:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:05:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:05:23,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:05:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-04-06 11:05:23,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:05:23,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473261532] [2022-04-06 11:05:23,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:05:23,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956886281] [2022-04-06 11:05:23,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956886281] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:05:23,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:05:23,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-04-06 11:05:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135241356] [2022-04-06 11:05:23,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:05:23,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 11:05:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:05:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 11:05:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:05:23,689 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:05:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:05:24,235 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-04-06 11:05:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 11:05:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2022-04-06 11:05:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:05:24,236 INFO L225 Difference]: With dead ends: 128 [2022-04-06 11:05:24,236 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 11:05:24,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-06 11:05:24,237 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 115 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:05:24,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 238 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 11:05:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 11:05:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 11:05:24,238 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 11:05:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 11:05:24,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-04-06 11:05:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:05:24,239 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 11:05:24,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:05:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 11:05:24,239 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 11:05:24,241 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:05:24,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:05:24,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 11:05:24,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 11:05:25,054 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 11:05:25,054 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 11:05:25,055 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-06 11:05:25,055 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 11:05:25,055 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-06 11:05:25,055 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,056 INFO L878 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,056 INFO L882 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-04-06 11:05:25,056 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-06 11:05:25,056 INFO L878 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-06 11:05:25,056 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-04-06 11:05:25,056 INFO L882 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-04-06 11:05:25,056 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-06 11:05:25,056 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-04-06 11:05:25,056 INFO L878 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-06 11:05:25,056 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-04-06 11:05:25,056 INFO L882 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-04-06 11:05:25,057 INFO L878 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,057 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,057 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,057 INFO L882 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-04-06 11:05:25,057 INFO L882 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-04-06 11:05:25,057 INFO L882 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-04-06 11:05:25,057 INFO L882 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-04-06 11:05:25,057 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,057 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-06 11:05:25,057 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 11:05:25,057 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-04-06 11:05:25,058 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-04-06 11:05:25,058 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-04-06 11:05:25,058 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-04-06 11:05:25,058 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-04-06 11:05:25,060 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:05:25,061 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 11:05:25,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:05:25 BasicIcfg [2022-04-06 11:05:25,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 11:05:25,074 INFO L158 Benchmark]: Toolchain (without parser) took 7309.26ms. Allocated memory was 170.9MB in the beginning and 205.5MB in the end (delta: 34.6MB). Free memory was 119.1MB in the beginning and 106.2MB in the end (delta: 12.8MB). Peak memory consumption was 47.6MB. Max. memory is 8.0GB. [2022-04-06 11:05:25,075 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 170.9MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 11:05:25,075 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.43ms. Allocated memory is still 170.9MB. Free memory was 118.9MB in the beginning and 147.8MB in the end (delta: -28.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 11:05:25,075 INFO L158 Benchmark]: Boogie Preprocessor took 20.57ms. Allocated memory is still 170.9MB. Free memory was 147.8MB in the beginning and 146.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 11:05:25,076 INFO L158 Benchmark]: RCFGBuilder took 209.75ms. Allocated memory is still 170.9MB. Free memory was 146.3MB in the beginning and 135.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 11:05:25,076 INFO L158 Benchmark]: IcfgTransformer took 20.71ms. Allocated memory is still 170.9MB. Free memory was 135.5MB in the beginning and 134.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:05:25,076 INFO L158 Benchmark]: TraceAbstraction took 6855.03ms. Allocated memory was 170.9MB in the beginning and 205.5MB in the end (delta: 34.6MB). Free memory was 133.8MB in the beginning and 106.2MB in the end (delta: 27.5MB). Peak memory consumption was 62.5MB. Max. memory is 8.0GB. [2022-04-06 11:05:25,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 170.9MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.43ms. Allocated memory is still 170.9MB. Free memory was 118.9MB in the beginning and 147.8MB in the end (delta: -28.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.57ms. Allocated memory is still 170.9MB. Free memory was 147.8MB in the beginning and 146.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 209.75ms. Allocated memory is still 170.9MB. Free memory was 146.3MB in the beginning and 135.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.71ms. Allocated memory is still 170.9MB. Free memory was 135.5MB in the beginning and 134.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 6855.03ms. Allocated memory was 170.9MB in the beginning and 205.5MB in the end (delta: 34.6MB). Free memory was 133.8MB in the beginning and 106.2MB in the end (delta: 27.5MB). Peak memory consumption was 62.5MB. 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: 17]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 270 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 243 mSDsluCounter, 1387 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 986 mSDsCounter, 192 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1010 IncrementalHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 192 mSolverCounterUnsat, 401 mSDtfsCounter, 1010 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 466 GetRequests, 390 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=9, InterpolantAutomatonStates: 65, 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, 10 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 84 PreInvPairs, 135 NumberOfFragments, 250 HoareAnnotationTreeSize, 84 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 1875 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 337 NumberOfCodeBlocks, 337 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 430 ConstructedInterpolants, 0 QuantifiedInterpolants, 1364 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1098 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 327/356 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: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-04-06 11:05:25,094 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...