/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/hard2_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 23:24:24,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 23:24:24,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 23:24:24,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 23:24:24,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 23:24:24,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 23:24:24,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 23:24:24,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 23:24:24,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 23:24:24,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 23:24:24,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 23:24:24,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 23:24:24,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 23:24:24,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 23:24:24,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 23:24:24,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 23:24:24,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 23:24:24,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 23:24:24,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 23:24:24,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 23:24:24,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 23:24:24,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 23:24:24,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 23:24:24,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 23:24:24,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 23:24:24,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 23:24:24,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 23:24:24,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 23:24:24,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 23:24:24,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-02-23 23:24:24,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 23:24:24,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 23:24:24,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 23:24:24,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 23:24:24,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 23:24:24,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 23:24:24,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 23:24:24,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 23:24:24,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 23:24:24,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 23:24:24,829 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 23:24:24,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 23:24:24,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 23:24:24,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 23:24:24,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 23:24:24,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 23:24:24,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:24:24,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 23:24:24,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 23:24:24,833 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 23:24:24,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 23:24:25,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 23:24:25,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 23:24:25,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 23:24:25,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 23:24:25,069 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 23:24:25,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c [2022-02-23 23:24:25,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b8f6cab/fac57a0ed900427f90c91bab315ec2c4/FLAGeef3f7327 [2022-02-23 23:24:25,517 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 23:24:25,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c [2022-02-23 23:24:25,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b8f6cab/fac57a0ed900427f90c91bab315ec2c4/FLAGeef3f7327 [2022-02-23 23:24:25,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b8f6cab/fac57a0ed900427f90c91bab315ec2c4 [2022-02-23 23:24:25,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 23:24:25,925 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 23:24:25,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 23:24:25,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 23:24:25,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 23:24:25,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:24:25" (1/1) ... [2022-02-23 23:24:25,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26854ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:25, skipping insertion in model container [2022-02-23 23:24:25,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:24:25" (1/1) ... [2022-02-23 23:24:25,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 23:24:25,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 23:24:26,108 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/hard2_unwindbound5.c[526,539] [2022-02-23 23:24:26,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:24:26,127 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 23:24:26,138 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/hard2_unwindbound5.c[526,539] [2022-02-23 23:24:26,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:24:26,153 INFO L208 MainTranslator]: Completed translation [2022-02-23 23:24:26,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26 WrapperNode [2022-02-23 23:24:26,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 23:24:26,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 23:24:26,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 23:24:26,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 23:24:26,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 23:24:26,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 23:24:26,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 23:24:26,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 23:24:26,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:24:26,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:26,224 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) [2022-02-23 23:24:26,228 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 [2022-02-23 23:24:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 23:24:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 23:24:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 23:24:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 23:24:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 23:24:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 23:24:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 23:24:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 23:24:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 23:24:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 23:24:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 23:24:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 23:24:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 23:24:26,304 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 23:24:26,306 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 23:24:26,480 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 23:24:26,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 23:24:26,485 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 23:24:26,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:24:26 BoogieIcfgContainer [2022-02-23 23:24:26,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 23:24:26,488 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 23:24:26,488 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 23:24:26,489 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 23:24:26,506 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:24:26" (1/1) ... [2022-02-23 23:24:26,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:24:26 BasicIcfg [2022-02-23 23:24:26,521 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 23:24:26,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 23:24:26,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 23:24:26,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 23:24:26,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:24:25" (1/4) ... [2022-02-23 23:24:26,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f979b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:24:26, skipping insertion in model container [2022-02-23 23:24:26,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:24:26" (2/4) ... [2022-02-23 23:24:26,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f979b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:24:26, skipping insertion in model container [2022-02-23 23:24:26,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:24:26" (3/4) ... [2022-02-23 23:24:26,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f979b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:24:26, skipping insertion in model container [2022-02-23 23:24:26,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:24:26" (4/4) ... [2022-02-23 23:24:26,527 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.cqvasr [2022-02-23 23:24:26,531 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 23:24:26,531 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 23:24:26,564 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 23:24:26,586 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 23:24:26,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 23:24:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 23:24:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 23:24:26,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:26,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:26,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-02-23 23:24:26,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:26,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812493809] [2022-02-23 23:24:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:26,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:24:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:24:26,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:26,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812493809] [2022-02-23 23:24:26,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812493809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:26,833 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:26,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 23:24:26,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000339567] [2022-02-23 23:24:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 23:24:26,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 23:24:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:24:26,872 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 23:24:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:26,962 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-02-23 23:24:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 23:24:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 23:24:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:26,973 INFO L225 Difference]: With dead ends: 57 [2022-02-23 23:24:26,973 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 23:24:26,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:24:26,981 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:26,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:24:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 23:24:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-02-23 23:24:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 23:24:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-02-23 23:24:27,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-02-23 23:24:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:27,025 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-02-23 23:24:27,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 23:24:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-02-23 23:24:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 23:24:27,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:27,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:27,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 23:24:27,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-02-23 23:24:27,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:27,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147864807] [2022-02-23 23:24:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:27,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:24:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:24:27,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:27,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147864807] [2022-02-23 23:24:27,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147864807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:27,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:27,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:24:27,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079362742] [2022-02-23 23:24:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:27,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:24:27,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:24:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:24:27,181 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 23:24:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:27,351 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-02-23 23:24:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:24:27,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 23:24:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:27,354 INFO L225 Difference]: With dead ends: 41 [2022-02-23 23:24:27,355 INFO L226 Difference]: Without dead ends: 39 [2022-02-23 23:24:27,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:24:27,358 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:27,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:24:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-23 23:24:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-02-23 23:24:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 23:24:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-02-23 23:24:27,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-02-23 23:24:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:27,368 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-02-23 23:24:27,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 23:24:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-02-23 23:24:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 23:24:27,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:27,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:27,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 23:24:27,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-02-23 23:24:27,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:27,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768716986] [2022-02-23 23:24:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:27,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:24:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:24:27,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:27,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768716986] [2022-02-23 23:24:27,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768716986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:27,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:27,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 23:24:27,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401402582] [2022-02-23 23:24:27,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:27,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:24:27,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:24:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:27,432 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 23:24:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:27,495 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-02-23 23:24:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 23:24:27,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 23:24:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:27,497 INFO L225 Difference]: With dead ends: 46 [2022-02-23 23:24:27,497 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 23:24:27,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:24:27,498 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:27,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 23:24:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 23:24:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 23:24:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-23 23:24:27,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-02-23 23:24:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:27,508 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-23 23:24:27,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 23:24:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-23 23:24:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 23:24:27,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:27,509 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:27,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 23:24:27,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:27,510 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-02-23 23:24:27,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:27,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102177298] [2022-02-23 23:24:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:24:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-23 23:24:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:24:27,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:27,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102177298] [2022-02-23 23:24:27,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102177298] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:27,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:27,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:24:27,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942833765] [2022-02-23 23:24:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:27,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:24:27,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:24:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:24:27,585 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:24:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:27,692 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-23 23:24:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:24:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-23 23:24:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:27,693 INFO L225 Difference]: With dead ends: 46 [2022-02-23 23:24:27,694 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 23:24:27,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:24:27,695 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:27,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:24:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 23:24:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-02-23 23:24:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 23:24:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-02-23 23:24:27,702 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-02-23 23:24:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:27,703 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-02-23 23:24:27,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:24:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-02-23 23:24:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 23:24:27,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:27,704 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:27,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 23:24:27,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-02-23 23:24:27,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:27,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100195303] [2022-02-23 23:24:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:27,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:27,714 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:27,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545910433] [2022-02-23 23:24:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:27,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:27,719 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) [2022-02-23 23:24:27,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 23:24:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:27,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 23:24:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 23:24:27,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:24:27,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:27,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100195303] [2022-02-23 23:24:27,894 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:27,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545910433] [2022-02-23 23:24:27,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545910433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:27,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:27,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:24:27,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784160066] [2022-02-23 23:24:27,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:27,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:24:27,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:24:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:27,896 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-02-23 23:24:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:27,935 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-02-23 23:24:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:24:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 22 [2022-02-23 23:24:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:27,936 INFO L225 Difference]: With dead ends: 65 [2022-02-23 23:24:27,936 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 23:24:27,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:24:27,937 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:27,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 23:24:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-23 23:24:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 23:24:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-23 23:24:27,945 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-02-23 23:24:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:27,946 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-23 23:24:27,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-02-23 23:24:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-23 23:24:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 23:24:27,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:27,947 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:27,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:28,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:28,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-02-23 23:24:28,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:28,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24776601] [2022-02-23 23:24:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:28,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:28,180 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:28,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670949586] [2022-02-23 23:24:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:28,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:28,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:28,182 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) [2022-02-23 23:24:28,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 23:24:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:24:28,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:24:28,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:24:28,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:28,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24776601] [2022-02-23 23:24:28,325 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:28,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670949586] [2022-02-23 23:24:28,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670949586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:28,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:28,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:24:28,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526955693] [2022-02-23 23:24:28,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:28,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:24:28,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:24:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:28,327 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:24:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:28,351 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-02-23 23:24:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:24:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-23 23:24:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:28,353 INFO L225 Difference]: With dead ends: 70 [2022-02-23 23:24:28,353 INFO L226 Difference]: Without dead ends: 63 [2022-02-23 23:24:28,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:28,354 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:28,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-23 23:24:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-02-23 23:24:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 23:24:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-02-23 23:24:28,362 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-02-23 23:24:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:28,362 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-02-23 23:24:28,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:24:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-02-23 23:24:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 23:24:28,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:28,363 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:28,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:28,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-02-23 23:24:28,585 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-02-23 23:24:28,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:28,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514169923] [2022-02-23 23:24:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:28,593 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:28,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83388078] [2022-02-23 23:24:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:28,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:28,595 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) [2022-02-23 23:24:28,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 23:24:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:24:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:24:28,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:24:28,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:28,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514169923] [2022-02-23 23:24:28,726 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:28,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83388078] [2022-02-23 23:24:28,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83388078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:28,727 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:28,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:24:28,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862007891] [2022-02-23 23:24:28,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:28,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:24:28,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:24:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:28,728 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:24:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:28,779 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-02-23 23:24:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:24:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-23 23:24:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:28,784 INFO L225 Difference]: With dead ends: 76 [2022-02-23 23:24:28,784 INFO L226 Difference]: Without dead ends: 64 [2022-02-23 23:24:28,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:24:28,786 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:28,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-23 23:24:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-23 23:24:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:24:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-02-23 23:24:28,793 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-02-23 23:24:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:28,793 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-02-23 23:24:28,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:24:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-02-23 23:24:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 23:24:28,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:28,795 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:28,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:29,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:29,018 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-02-23 23:24:29,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:29,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911334143] [2022-02-23 23:24:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:29,026 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:29,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764791127] [2022-02-23 23:24:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:29,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:29,028 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) [2022-02-23 23:24:29,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 23:24:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:24:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-23 23:24:29,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:24:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 23:24:29,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:29,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911334143] [2022-02-23 23:24:29,273 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:29,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764791127] [2022-02-23 23:24:29,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764791127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:24:29,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:24:29,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 23:24:29,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115888751] [2022-02-23 23:24:29,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:24:29,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 23:24:29,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 23:24:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:24:29,275 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-23 23:24:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:29,364 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2022-02-23 23:24:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:24:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-02-23 23:24:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:29,366 INFO L225 Difference]: With dead ends: 144 [2022-02-23 23:24:29,366 INFO L226 Difference]: Without dead ends: 119 [2022-02-23 23:24:29,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:24:29,367 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:29,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 207 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:24:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-23 23:24:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-02-23 23:24:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-23 23:24:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-02-23 23:24:29,379 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-02-23 23:24:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:29,379 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-02-23 23:24:29,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-23 23:24:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-02-23 23:24:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 23:24:29,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:29,381 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:29,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:29,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:29,594 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-02-23 23:24:29,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:29,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075474354] [2022-02-23 23:24:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:29,602 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:29,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958857163] [2022-02-23 23:24:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:29,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:29,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:29,604 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) [2022-02-23 23:24:29,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 23:24:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:29,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 23:24:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:24:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:24:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 23:24:29,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:29,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075474354] [2022-02-23 23:24:29,944 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:29,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958857163] [2022-02-23 23:24:29,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958857163] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 23:24:29,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 23:24:29,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 23:24:29,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730798832] [2022-02-23 23:24:29,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:29,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:24:29,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:24:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 23:24:29,946 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:24:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:29,994 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2022-02-23 23:24:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:24:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-02-23 23:24:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:29,997 INFO L225 Difference]: With dead ends: 129 [2022-02-23 23:24:29,997 INFO L226 Difference]: Without dead ends: 125 [2022-02-23 23:24:29,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:24:29,999 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:30,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-23 23:24:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-02-23 23:24:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 23:24:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-02-23 23:24:30,026 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-02-23 23:24:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:30,028 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-02-23 23:24:30,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:24:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-02-23 23:24:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-23 23:24:30,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:30,034 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:30,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:30,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:30,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-02-23 23:24:30,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:30,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736096350] [2022-02-23 23:24:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:30,255 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:30,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634023520] [2022-02-23 23:24:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:30,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:30,263 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) [2022-02-23 23:24:30,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 23:24:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 23:24:30,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 23:24:30,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:24:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 23:24:30,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:30,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736096350] [2022-02-23 23:24:30,533 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:30,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634023520] [2022-02-23 23:24:30,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634023520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:24:30,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:24:30,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-23 23:24:30,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391052998] [2022-02-23 23:24:30,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:24:30,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 23:24:30,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 23:24:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-23 23:24:30,535 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-23 23:24:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:30,628 INFO L93 Difference]: Finished difference Result 198 states and 236 transitions. [2022-02-23 23:24:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:24:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-02-23 23:24:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:30,630 INFO L225 Difference]: With dead ends: 198 [2022-02-23 23:24:30,631 INFO L226 Difference]: Without dead ends: 177 [2022-02-23 23:24:30,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:24:30,632 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:30,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 268 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:24:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-23 23:24:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2022-02-23 23:24:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 117 states have internal predecessors, (131), 39 states have call successors, (39), 23 states have call predecessors, (39), 21 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-23 23:24:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-02-23 23:24:30,646 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 53 [2022-02-23 23:24:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:30,646 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-02-23 23:24:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-23 23:24:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-02-23 23:24:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-23 23:24:30,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:30,647 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:30,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:30,866 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:30,866 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-02-23 23:24:30,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:30,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518322541] [2022-02-23 23:24:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:30,875 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:30,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678031274] [2022-02-23 23:24:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:30,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:30,877 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) [2022-02-23 23:24:30,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 23:24:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 23:24:30,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 23:24:31,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:24:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 23:24:32,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:32,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518322541] [2022-02-23 23:24:32,239 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:32,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678031274] [2022-02-23 23:24:32,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678031274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:24:32,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:24:32,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 23:24:32,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462563669] [2022-02-23 23:24:32,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:24:32,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 23:24:32,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 23:24:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:24:32,240 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 23:24:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:36,251 INFO L93 Difference]: Finished difference Result 270 states and 344 transitions. [2022-02-23 23:24:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:24:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-02-23 23:24:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:36,253 INFO L225 Difference]: With dead ends: 270 [2022-02-23 23:24:36,253 INFO L226 Difference]: Without dead ends: 225 [2022-02-23 23:24:36,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-23 23:24:36,254 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 53 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:36,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 290 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 23:24:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-23 23:24:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2022-02-23 23:24:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 147 states have internal predecessors, (172), 45 states have call successors, (45), 26 states have call predecessors, (45), 25 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 23:24:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 259 transitions. [2022-02-23 23:24:36,273 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 259 transitions. Word has length 62 [2022-02-23 23:24:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:36,273 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 259 transitions. [2022-02-23 23:24:36,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 23:24:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 259 transitions. [2022-02-23 23:24:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-23 23:24:36,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:36,281 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:36,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:36,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:36,482 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-02-23 23:24:36,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:36,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347020176] [2022-02-23 23:24:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:36,490 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:36,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545255750] [2022-02-23 23:24:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:36,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:36,496 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) [2022-02-23 23:24:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 23:24:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-23 23:24:36,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-02-23 23:24:37,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:24:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-02-23 23:24:37,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:37,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347020176] [2022-02-23 23:24:37,283 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:37,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545255750] [2022-02-23 23:24:37,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545255750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:24:37,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:24:37,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-02-23 23:24:37,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108947214] [2022-02-23 23:24:37,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:24:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 23:24:37,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 23:24:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-23 23:24:37,285 INFO L87 Difference]: Start difference. First operand 212 states and 259 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-02-23 23:24:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:37,703 INFO L93 Difference]: Finished difference Result 260 states and 320 transitions. [2022-02-23 23:24:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 23:24:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-02-23 23:24:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:37,705 INFO L225 Difference]: With dead ends: 260 [2022-02-23 23:24:37,706 INFO L226 Difference]: Without dead ends: 184 [2022-02-23 23:24:37,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-23 23:24:37,707 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:37,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 254 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 23:24:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-23 23:24:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2022-02-23 23:24:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 118 states have internal predecessors, (135), 36 states have call successors, (36), 24 states have call predecessors, (36), 22 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-02-23 23:24:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2022-02-23 23:24:37,728 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 73 [2022-02-23 23:24:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:37,728 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2022-02-23 23:24:37,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-02-23 23:24:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2022-02-23 23:24:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-23 23:24:37,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:37,729 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:37,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:37,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 23:24:37,943 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-02-23 23:24:37,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:37,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786832478] [2022-02-23 23:24:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:37,951 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:37,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716767140] [2022-02-23 23:24:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:37,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:37,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:37,956 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) [2022-02-23 23:24:37,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 23:24:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:38,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 23:24:38,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-02-23 23:24:38,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:24:38,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:38,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786832478] [2022-02-23 23:24:38,176 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:38,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716767140] [2022-02-23 23:24:38,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716767140] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:24:38,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:24:38,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:24:38,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292397624] [2022-02-23 23:24:38,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:24:38,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:24:38,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:24:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:38,177 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 23:24:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:38,231 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2022-02-23 23:24:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:24:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-02-23 23:24:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:38,234 INFO L225 Difference]: With dead ends: 192 [2022-02-23 23:24:38,234 INFO L226 Difference]: Without dead ends: 172 [2022-02-23 23:24:38,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:24:38,235 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 27 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:38,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 89 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-23 23:24:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2022-02-23 23:24:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 113 states have internal predecessors, (130), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 23:24:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2022-02-23 23:24:38,257 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 82 [2022-02-23 23:24:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:38,258 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2022-02-23 23:24:38,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 23:24:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2022-02-23 23:24:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 23:24:38,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:38,259 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:38,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:38,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 23:24:38,483 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash -468178091, now seen corresponding path program 2 times [2022-02-23 23:24:38,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:38,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712908841] [2022-02-23 23:24:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:38,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:38,490 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:38,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583892038] [2022-02-23 23:24:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 23:24:38,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:38,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:24:38,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 23:24:38,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 23:24:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:24:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 23:24:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-02-23 23:24:38,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:24:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 23:24:38,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:24:38,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712908841] [2022-02-23 23:24:38,862 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:24:38,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583892038] [2022-02-23 23:24:38,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583892038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:24:38,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:24:38,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-02-23 23:24:38,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927714340] [2022-02-23 23:24:38,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:24:38,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 23:24:38,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:24:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 23:24:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:24:38,864 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-02-23 23:24:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:24:38,946 INFO L93 Difference]: Finished difference Result 228 states and 280 transitions. [2022-02-23 23:24:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 23:24:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 91 [2022-02-23 23:24:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:24:38,948 INFO L225 Difference]: With dead ends: 228 [2022-02-23 23:24:38,948 INFO L226 Difference]: Without dead ends: 169 [2022-02-23 23:24:38,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-02-23 23:24:38,949 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:24:38,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:24:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-02-23 23:24:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-02-23 23:24:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 113 states have (on average 1.168141592920354) internal successors, (132), 115 states have internal predecessors, (132), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 23:24:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2022-02-23 23:24:38,963 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 91 [2022-02-23 23:24:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:24:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2022-02-23 23:24:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-02-23 23:24:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2022-02-23 23:24:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 23:24:38,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:24:38,965 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:24:38,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 23:24:39,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 23:24:39,187 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:24:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:24:39,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2091436208, now seen corresponding path program 1 times [2022-02-23 23:24:39,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:24:39,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263140806] [2022-02-23 23:24:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:39,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:24:39,195 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:24:39,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534982939] [2022-02-23 23:24:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:24:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:24:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:24:39,197 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:24:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 23:24:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:24:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-23 23:24:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:24:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 23:24:39,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:25:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 23:25:04,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:25:04,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263140806] [2022-02-23 23:25:04,640 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:25:04,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534982939] [2022-02-23 23:25:04,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534982939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:25:04,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:25:04,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 23:25:04,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324819357] [2022-02-23 23:25:04,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:25:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 23:25:04,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:25:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 23:25:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-23 23:25:04,642 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-23 23:25:16,486 WARN L232 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 209 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:25:18,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:25:23,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:25:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:25:24,668 INFO L93 Difference]: Finished difference Result 271 states and 349 transitions. [2022-02-23 23:25:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 23:25:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-02-23 23:25:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:25:24,670 INFO L225 Difference]: With dead ends: 271 [2022-02-23 23:25:24,671 INFO L226 Difference]: Without dead ends: 232 [2022-02-23 23:25:24,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=72, Invalid=307, Unknown=1, NotChecked=0, Total=380 [2022-02-23 23:25:24,672 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 86 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 113 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-02-23 23:25:24,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 725 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 492 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-02-23 23:25:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-23 23:25:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 198. [2022-02-23 23:25:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 135 states have internal predecessors, (158), 44 states have call successors, (44), 23 states have call predecessors, (44), 22 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 23:25:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 244 transitions. [2022-02-23 23:25:24,696 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 244 transitions. Word has length 94 [2022-02-23 23:25:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:25:24,696 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 244 transitions. [2022-02-23 23:25:24,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-23 23:25:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 244 transitions. [2022-02-23 23:25:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 23:25:24,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:25:24,698 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:25:24,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 23:25:24,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 23:25:24,898 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:25:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:25:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-02-23 23:25:24,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:25:24,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991329294] [2022-02-23 23:25:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:25:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:25:24,905 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:25:24,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343136248] [2022-02-23 23:25:24,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 23:25:24,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:25:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:25:24,910 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:25:24,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 23:25:24,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 23:25:24,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:25:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 23:25:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:25:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-02-23 23:25:25,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:25:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 23:25:25,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:25:25,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991329294] [2022-02-23 23:25:25,332 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:25:25,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343136248] [2022-02-23 23:25:25,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343136248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:25:25,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:25:25,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-02-23 23:25:25,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418769485] [2022-02-23 23:25:25,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:25:25,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 23:25:25,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:25:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 23:25:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-23 23:25:25,333 INFO L87 Difference]: Start difference. First operand 198 states and 244 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 8 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-02-23 23:25:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:25:25,435 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2022-02-23 23:25:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 23:25:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 8 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 94 [2022-02-23 23:25:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:25:25,438 INFO L225 Difference]: With dead ends: 237 [2022-02-23 23:25:25,438 INFO L226 Difference]: Without dead ends: 165 [2022-02-23 23:25:25,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:25:25,440 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 54 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:25:25,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 205 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:25:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-23 23:25:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 152. [2022-02-23 23:25:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 105 states have internal predecessors, (110), 27 states have call successors, (27), 23 states have call predecessors, (27), 22 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 23:25:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2022-02-23 23:25:25,456 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 94 [2022-02-23 23:25:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:25:25,457 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2022-02-23 23:25:25,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 8 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-02-23 23:25:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2022-02-23 23:25:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-23 23:25:25,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:25:25,459 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:25:25,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 23:25:25,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 23:25:25,675 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:25:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:25:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash -952273693, now seen corresponding path program 2 times [2022-02-23 23:25:25,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:25:25,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842736745] [2022-02-23 23:25:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:25:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:25:25,683 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:25:25,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176148662] [2022-02-23 23:25:25,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 23:25:25,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:25:25,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:25:25,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:25:25,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 23:25:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 23:25:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-23 23:25:25,745 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 23:25:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 23:25:25,823 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 23:25:25,824 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 23:25:25,824 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 23:25:25,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 23:25:26,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 23:25:26,050 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:25:26,052 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 23:25:26,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:25:26 BasicIcfg [2022-02-23 23:25:26,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 23:25:26,095 INFO L158 Benchmark]: Toolchain (without parser) took 60169.55ms. Allocated memory was 181.4MB in the beginning and 271.6MB in the end (delta: 90.2MB). Free memory was 123.3MB in the beginning and 187.4MB in the end (delta: -64.1MB). Peak memory consumption was 27.4MB. Max. memory is 8.0GB. [2022-02-23 23:25:26,095 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory is still 139.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 23:25:26,096 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.52ms. Allocated memory was 181.4MB in the beginning and 271.6MB in the end (delta: 90.2MB). Free memory was 123.1MB in the beginning and 243.5MB in the end (delta: -120.5MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. [2022-02-23 23:25:26,096 INFO L158 Benchmark]: Boogie Preprocessor took 36.43ms. Allocated memory is still 271.6MB. Free memory was 243.5MB in the beginning and 242.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 23:25:26,096 INFO L158 Benchmark]: RCFGBuilder took 293.24ms. Allocated memory is still 271.6MB. Free memory was 242.0MB in the beginning and 230.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 23:25:26,096 INFO L158 Benchmark]: IcfgTransformer took 33.13ms. Allocated memory is still 271.6MB. Free memory was 230.4MB in the beginning and 229.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 23:25:26,096 INFO L158 Benchmark]: TraceAbstraction took 59572.33ms. Allocated memory is still 271.6MB. Free memory was 228.9MB in the beginning and 187.4MB in the end (delta: 41.5MB). Peak memory consumption was 43.1MB. Max. memory is 8.0GB. [2022-02-23 23:25:26,097 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 181.4MB. Free memory is still 139.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.52ms. Allocated memory was 181.4MB in the beginning and 271.6MB in the end (delta: 90.2MB). Free memory was 123.1MB in the beginning and 243.5MB in the end (delta: -120.5MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.43ms. Allocated memory is still 271.6MB. Free memory was 243.5MB in the beginning and 242.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 293.24ms. Allocated memory is still 271.6MB. Free memory was 242.0MB in the beginning and 230.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.13ms. Allocated memory is still 271.6MB. Free memory was 230.4MB in the beginning and 229.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 59572.33ms. Allocated memory is still 271.6MB. Free memory was 228.9MB in the beginning and 187.4MB in the end (delta: 41.5MB). Peak memory consumption was 43.1MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=11, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=7, B=1, counter=0, d=1, p=1, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=7, B=1, counter=1, d=2, p=2, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=7, B=1, counter=2, d=4, p=4, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=7, B=1, counter=3, d=8, p=8, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L44] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=7] [L44] COND TRUE counter++<5 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=7, B=1, counter=5, d=4, p=4, q=0, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=7, B=1, counter=5, d=4, p=4, q=4, r=3] [L44] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=3] [L44] COND FALSE !(counter++<5) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.5s, OverallIterations: 17, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 25.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 526 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 466 mSDsluCounter, 2945 SdHoareTripleChecker+Invalid, 10.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2201 mSDsCounter, 399 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1674 IncrementalHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 399 mSolverCounterUnsat, 744 mSDtfsCounter, 1674 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1301 GetRequests, 1163 SyntacticMatches, 13 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 18.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=11, InterpolantAutomatonStates: 126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 111 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 29.6s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1283 ConstructedInterpolants, 0 QuantifiedInterpolants, 17980 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2039 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 3212/3666 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-23 23:25:26,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...