/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/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:40:38,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:40:38,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:40:38,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:40:38,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:40:38,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:40:38,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:40:38,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:40:38,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:40:38,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:40:38,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:40:38,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:40:38,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:40:38,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:40:38,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:40:38,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:40:38,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:40:38,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:40:38,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:40:38,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:40:38,727 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:40:38,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:40:38,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:40:38,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:40:38,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:40:38,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:40:38,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:40:38,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:40:38,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:40:38,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:40:38,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:40:38,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:40:38,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:40:38,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:40:38,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:40:38,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:40:38,775 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:40:38,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:40:38,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:40:38,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:40:38,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:40:38,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:40:38,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:40:38,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:40:38,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:40:38,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:40:38,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:40:38,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:40:38,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:40:38,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:40:38,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:40:38,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:40:38,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:40:38,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:40:38,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:40:38,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:40:38,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:40:38,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:40:38,779 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:40:38,779 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:40:39,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:40:39,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:40:39,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:40:39,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:40:39,041 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:40:39,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-04-05 07:40:39,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5df8a204/10321578288f4905a9555eb619ec2982/FLAGbe974eac3 [2022-04-05 07:40:39,520 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:40:39,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-04-05 07:40:39,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5df8a204/10321578288f4905a9555eb619ec2982/FLAGbe974eac3 [2022-04-05 07:40:39,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5df8a204/10321578288f4905a9555eb619ec2982 [2022-04-05 07:40:39,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:40:39,546 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:40:39,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:40:39,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:40:39,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:40:39,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f632b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39, skipping insertion in model container [2022-04-05 07:40:39,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:40:39,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:40:39,726 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/egcd3-ll_unwindbound20.c[490,503] [2022-04-05 07:40:39,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:40:39,771 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:40:39,782 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/egcd3-ll_unwindbound20.c[490,503] [2022-04-05 07:40:39,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:40:39,816 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:40:39,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39 WrapperNode [2022-04-05 07:40:39,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:40:39,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:40:39,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:40:39,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:40:39,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:40:39,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:40:39,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:40:39,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:40:39,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (1/1) ... [2022-04-05 07:40:39,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:40:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:39,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 07:40:39,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 07:40:39,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:40:39,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:40:39,902 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:40:39,902 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:40:39,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:40:39,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:40:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:40:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:40:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:40:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:40:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:40:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:40:39,957 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:40:39,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:40:40,131 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:40:40,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:40:40,136 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 07:40:40,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:40:40 BoogieIcfgContainer [2022-04-05 07:40:40,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:40:40,139 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:40:40,142 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:40:40,147 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:40:40,154 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:40:40" (1/1) ... [2022-04-05 07:40:40,156 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:40:40,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:40:40 BasicIcfg [2022-04-05 07:40:40,185 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:40:40,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:40:40,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:40:40,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:40:40,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:40:39" (1/4) ... [2022-04-05 07:40:40,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535b06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:40:40, skipping insertion in model container [2022-04-05 07:40:40,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:40:39" (2/4) ... [2022-04-05 07:40:40,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535b06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:40:40, skipping insertion in model container [2022-04-05 07:40:40,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:40:40" (3/4) ... [2022-04-05 07:40:40,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535b06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:40:40, skipping insertion in model container [2022-04-05 07:40:40,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:40:40" (4/4) ... [2022-04-05 07:40:40,208 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.cqvasr [2022-04-05 07:40:40,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:40:40,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:40:40,289 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:40:40,300 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 07:40:40,300 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:40:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:40:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 07:40:40,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:40,326 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:40,327 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-04-05 07:40:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811491290] [2022-04-05 07:40:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:40:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:40,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:40:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:40,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 07:40:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811491290] [2022-04-05 07:40:40,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811491290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:40,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:40,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:40:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621252982] [2022-04-05 07:40:40,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:40,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:40:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:40:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:40:40,591 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:40,669 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-04-05 07:40:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:40:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 07:40:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:40,677 INFO L225 Difference]: With dead ends: 74 [2022-04-05 07:40:40,677 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 07:40:40,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:40:40,682 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:40,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 07:40:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-05 07:40:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-04-05 07:40:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-05 07:40:40,720 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-05 07:40:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:40,721 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-05 07:40:40,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-05 07:40:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 07:40:40,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:40,723 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:40,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:40:40,723 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-04-05 07:40:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290299865] [2022-04-05 07:40:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:40,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459222029] [2022-04-05 07:40:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:40,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:40,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:40,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:40:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:40:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:40,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:40,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:40,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290299865] [2022-04-05 07:40:40,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:40,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459222029] [2022-04-05 07:40:40,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459222029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:40,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:40,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 07:40:40,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694314522] [2022-04-05 07:40:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:40,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 07:40:40,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 07:40:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 07:40:40,942 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:40,956 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-04-05 07:40:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 07:40:40,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 07:40:40,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:40,957 INFO L225 Difference]: With dead ends: 44 [2022-04-05 07:40:40,957 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 07:40:40,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 07:40:40,959 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:40,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 07:40:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 07:40:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-04-05 07:40:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-05 07:40:40,967 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-05 07:40:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:40,968 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-05 07:40:40,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-05 07:40:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 07:40:40,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:40,969 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:40,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:41,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:41,187 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-04-05 07:40:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763970542] [2022-04-05 07:40:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:41,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:41,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236959196] [2022-04-05 07:40:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:41,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:41,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:40:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:41,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:41,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763970542] [2022-04-05 07:40:41,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236959196] [2022-04-05 07:40:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236959196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:41,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:41,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:40:41,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833229646] [2022-04-05 07:40:41,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:41,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:40:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:40:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:41,324 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:41,391 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-04-05 07:40:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:40:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-05 07:40:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:41,393 INFO L225 Difference]: With dead ends: 57 [2022-04-05 07:40:41,393 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 07:40:41,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:40:41,395 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:41,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 148 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 07:40:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-04-05 07:40:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-04-05 07:40:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-04-05 07:40:41,405 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-04-05 07:40:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:41,405 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-04-05 07:40:41,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-04-05 07:40:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 07:40:41,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:41,406 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:41,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:41,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 07:40:41,620 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-04-05 07:40:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:41,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291420344] [2022-04-05 07:40:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:41,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234366092] [2022-04-05 07:40:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:41,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:41,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:41,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:40:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:41,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:41,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291420344] [2022-04-05 07:40:41,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:41,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234366092] [2022-04-05 07:40:41,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234366092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:41,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:41,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:41,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123993718] [2022-04-05 07:40:41,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:41,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:41,789 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:41,831 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-04-05 07:40:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:40:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-05 07:40:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:41,835 INFO L225 Difference]: With dead ends: 62 [2022-04-05 07:40:41,835 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 07:40:41,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:41,837 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:41,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 07:40:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-05 07:40:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 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) [2022-04-05 07:40:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-04-05 07:40:41,844 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-04-05 07:40:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:41,844 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-04-05 07:40:41,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-04-05 07:40:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 07:40:41,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:41,845 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:41,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:42,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:42,078 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-04-05 07:40:42,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:42,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816372343] [2022-04-05 07:40:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:42,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:42,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018000760] [2022-04-05 07:40:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:42,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:42,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:42,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:42,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:40:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:40:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:42,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816372343] [2022-04-05 07:40:42,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018000760] [2022-04-05 07:40:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018000760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:42,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:42,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-05 07:40:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270210761] [2022-04-05 07:40:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:42,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:42,457 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:42,639 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-04-05 07:40:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:40:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-05 07:40:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:42,641 INFO L225 Difference]: With dead ends: 68 [2022-04-05 07:40:42,641 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 07:40:42,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:40:42,642 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:42,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 07:40:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-04-05 07:40:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 07:40:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-05 07:40:42,655 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-05 07:40:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:42,655 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-05 07:40:42,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-05 07:40:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 07:40:42,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:42,656 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:42,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:42,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:42,867 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-04-05 07:40:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078877346] [2022-04-05 07:40:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:42,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321685438] [2022-04-05 07:40:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:42,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:42,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:42,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:42,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:40:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:42,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:40:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:43,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:43,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:43,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078877346] [2022-04-05 07:40:43,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:43,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321685438] [2022-04-05 07:40:43,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321685438] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:43,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:43,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 07:40:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115894752] [2022-04-05 07:40:43,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:43,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:43,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:43,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:43,116 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:43,238 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2022-04-05 07:40:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 07:40:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-04-05 07:40:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:43,242 INFO L225 Difference]: With dead ends: 151 [2022-04-05 07:40:43,242 INFO L226 Difference]: Without dead ends: 144 [2022-04-05 07:40:43,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-04-05 07:40:43,245 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:43,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:43,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-05 07:40:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-04-05 07:40:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 07:40:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-04-05 07:40:43,286 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-04-05 07:40:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:43,288 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-04-05 07:40:43,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-04-05 07:40:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 07:40:43,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:43,292 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:43,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:43,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:43,494 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:43,495 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-04-05 07:40:43,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:43,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591349302] [2022-04-05 07:40:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:43,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:43,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837284361] [2022-04-05 07:40:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:43,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:43,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:43,511 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:43,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:40:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:40:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:43,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:43,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591349302] [2022-04-05 07:40:43,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837284361] [2022-04-05 07:40:43,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837284361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:43,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:43,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 07:40:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239481773] [2022-04-05 07:40:43,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:43,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:40:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:40:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:40:43,744 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:43,920 INFO L93 Difference]: Finished difference Result 187 states and 265 transitions. [2022-04-05 07:40:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:40:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-05 07:40:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:43,922 INFO L225 Difference]: With dead ends: 187 [2022-04-05 07:40:43,922 INFO L226 Difference]: Without dead ends: 175 [2022-04-05 07:40:43,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:40:43,923 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:43,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 306 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-05 07:40:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-04-05 07:40:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 07:40:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-04-05 07:40:43,944 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-04-05 07:40:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:43,944 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-04-05 07:40:43,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-04-05 07:40:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 07:40:43,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:43,945 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:43,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:44,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:44,160 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-04-05 07:40:44,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:44,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889988861] [2022-04-05 07:40:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:44,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:44,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:44,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093744671] [2022-04-05 07:40:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:44,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:44,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:40:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:44,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:40:44,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:44,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:44,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889988861] [2022-04-05 07:40:44,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093744671] [2022-04-05 07:40:44,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093744671] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:44,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:44,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-05 07:40:44,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181849610] [2022-04-05 07:40:44,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:44,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:44,463 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 07:40:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:44,638 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2022-04-05 07:40:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:40:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-04-05 07:40:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:44,641 INFO L225 Difference]: With dead ends: 157 [2022-04-05 07:40:44,641 INFO L226 Difference]: Without dead ends: 155 [2022-04-05 07:40:44,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-05 07:40:44,643 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:44,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-05 07:40:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-04-05 07:40:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 07:40:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-04-05 07:40:44,672 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-04-05 07:40:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:44,673 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-04-05 07:40:44,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 07:40:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-04-05 07:40:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:40:44,675 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:44,675 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:44,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:44,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:44,895 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-04-05 07:40:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184527218] [2022-04-05 07:40:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:44,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:44,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687745870] [2022-04-05 07:40:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:44,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:44,909 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:44,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:40:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:44,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 07:40:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 07:40:45,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184527218] [2022-04-05 07:40:45,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687745870] [2022-04-05 07:40:45,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687745870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:45,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:45,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-05 07:40:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316972584] [2022-04-05 07:40:45,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:45,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 07:40:45,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 07:40:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:40:45,262 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:45,444 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2022-04-05 07:40:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:40:45,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 07:40:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:45,448 INFO L225 Difference]: With dead ends: 179 [2022-04-05 07:40:45,448 INFO L226 Difference]: Without dead ends: 177 [2022-04-05 07:40:45,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:40:45,450 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:45,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 344 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-05 07:40:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-04-05 07:40:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 07:40:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-04-05 07:40:45,471 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-04-05 07:40:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:45,471 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-04-05 07:40:45,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-04-05 07:40:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:40:45,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:45,472 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:45,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:45,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 07:40:45,688 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-04-05 07:40:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:45,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122718874] [2022-04-05 07:40:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:45,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:45,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972472005] [2022-04-05 07:40:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:45,709 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:45,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:40:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:40:45,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:45,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:45,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122718874] [2022-04-05 07:40:45,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972472005] [2022-04-05 07:40:45,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972472005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:45,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:45,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:40:45,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664490758] [2022-04-05 07:40:45,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:45,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:40:45,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:40:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:45,835 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:45,869 INFO L93 Difference]: Finished difference Result 241 states and 329 transitions. [2022-04-05 07:40:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:40:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-05 07:40:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:45,872 INFO L225 Difference]: With dead ends: 241 [2022-04-05 07:40:45,872 INFO L226 Difference]: Without dead ends: 174 [2022-04-05 07:40:45,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:45,875 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:45,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-05 07:40:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-05 07:40:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 07:40:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-04-05 07:40:45,918 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-04-05 07:40:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:45,918 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-04-05 07:40:45,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 07:40:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-04-05 07:40:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 07:40:45,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:45,919 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:45,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:46,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 07:40:46,135 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-04-05 07:40:46,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:46,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274587203] [2022-04-05 07:40:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:46,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:46,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114471443] [2022-04-05 07:40:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:46,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:46,153 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) [2022-04-05 07:40:46,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 07:40:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 07:40:46,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274587203] [2022-04-05 07:40:46,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114471443] [2022-04-05 07:40:46,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114471443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:46,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:46,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:46,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154329929] [2022-04-05 07:40:46,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:46,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:46,278 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:46,324 INFO L93 Difference]: Finished difference Result 239 states and 335 transitions. [2022-04-05 07:40:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:40:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 07:40:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:46,326 INFO L225 Difference]: With dead ends: 239 [2022-04-05 07:40:46,326 INFO L226 Difference]: Without dead ends: 237 [2022-04-05 07:40:46,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:46,327 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:46,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-05 07:40:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-04-05 07:40:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-05 07:40:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-04-05 07:40:46,350 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-04-05 07:40:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:46,350 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-04-05 07:40:46,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:40:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-04-05 07:40:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 07:40:46,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:46,351 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:46,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:46,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 07:40:46,572 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-04-05 07:40:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189202962] [2022-04-05 07:40:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:46,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:46,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:46,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415870206] [2022-04-05 07:40:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:46,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:46,584 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) [2022-04-05 07:40:46,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 07:40:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 07:40:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189202962] [2022-04-05 07:40:46,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:46,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415870206] [2022-04-05 07:40:46,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415870206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:46,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:46,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 07:40:46,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089592776] [2022-04-05 07:40:46,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:46,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:40:46,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:46,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:40:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:40:46,961 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 07:40:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:47,743 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-04-05 07:40:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 07:40:47,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-05 07:40:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:47,746 INFO L225 Difference]: With dead ends: 392 [2022-04-05 07:40:47,746 INFO L226 Difference]: Without dead ends: 390 [2022-04-05 07:40:47,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-05 07:40:47,747 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 170 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:47,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 318 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 07:40:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-05 07:40:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-04-05 07:40:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-05 07:40:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-04-05 07:40:47,786 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-04-05 07:40:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:47,786 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-04-05 07:40:47,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 07:40:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-04-05 07:40:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 07:40:47,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:47,788 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:47,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:48,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 07:40:48,012 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-04-05 07:40:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908465252] [2022-04-05 07:40:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:48,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:48,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:48,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227254213] [2022-04-05 07:40:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:48,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:48,026 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) [2022-04-05 07:40:48,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 07:40:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:40:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 07:40:48,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908465252] [2022-04-05 07:40:48,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227254213] [2022-04-05 07:40:48,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227254213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:48,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:48,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340309485] [2022-04-05 07:40:48,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:48,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:48,147 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 07:40:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:48,226 INFO L93 Difference]: Finished difference Result 566 states and 887 transitions. [2022-04-05 07:40:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:40:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-04-05 07:40:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:48,230 INFO L225 Difference]: With dead ends: 566 [2022-04-05 07:40:48,230 INFO L226 Difference]: Without dead ends: 564 [2022-04-05 07:40:48,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:40:48,231 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:48,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:40:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-04-05 07:40:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-04-05 07:40:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-05 07:40:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-04-05 07:40:48,290 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-04-05 07:40:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:48,291 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-04-05 07:40:48,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 07:40:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-04-05 07:40:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:40:48,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:48,292 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:48,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:48,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 07:40:48,507 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-04-05 07:40:48,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:48,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735986476] [2022-04-05 07:40:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:48,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:48,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427136302] [2022-04-05 07:40:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:48,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:48,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:48,521 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) [2022-04-05 07:40:48,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 07:40:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 07:40:48,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 07:40:48,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 07:40:48,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:48,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735986476] [2022-04-05 07:40:48,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:48,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427136302] [2022-04-05 07:40:48,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427136302] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:48,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:48,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-05 07:40:48,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269391746] [2022-04-05 07:40:48,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:48,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 07:40:48,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 07:40:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:40:48,765 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:48,991 INFO L93 Difference]: Finished difference Result 1127 states and 1721 transitions. [2022-04-05 07:40:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 07:40:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-05 07:40:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:48,997 INFO L225 Difference]: With dead ends: 1127 [2022-04-05 07:40:48,997 INFO L226 Difference]: Without dead ends: 770 [2022-04-05 07:40:48,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-04-05 07:40:48,999 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 169 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:48,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 342 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-05 07:40:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-04-05 07:40:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-04-05 07:40:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-04-05 07:40:49,111 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-04-05 07:40:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:49,111 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-04-05 07:40:49,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-04-05 07:40:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 07:40:49,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:49,112 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:49,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:49,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 07:40:49,329 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-04-05 07:40:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:49,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893343106] [2022-04-05 07:40:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:49,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:49,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749934613] [2022-04-05 07:40:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:49,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:49,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:49,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 07:40:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 07:40:49,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:49,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 07:40:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:49,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893343106] [2022-04-05 07:40:49,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:49,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749934613] [2022-04-05 07:40:49,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749934613] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:49,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:49,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 07:40:49,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545628949] [2022-04-05 07:40:49,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:49,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 07:40:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 07:40:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:40:49,612 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:49,974 INFO L93 Difference]: Finished difference Result 1597 states and 2379 transitions. [2022-04-05 07:40:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-05 07:40:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-04-05 07:40:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:49,980 INFO L225 Difference]: With dead ends: 1597 [2022-04-05 07:40:49,980 INFO L226 Difference]: Without dead ends: 1119 [2022-04-05 07:40:49,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:40:49,982 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 255 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:49,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 319 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:40:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-04-05 07:40:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-04-05 07:40:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-04-05 07:40:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-04-05 07:40:50,113 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-04-05 07:40:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:50,113 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-04-05 07:40:50,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:40:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-04-05 07:40:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 07:40:50,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:50,114 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:50,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:50,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:50,330 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-04-05 07:40:50,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564947196] [2022-04-05 07:40:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:50,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438978088] [2022-04-05 07:40:50,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:40:50,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:50,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:50,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:50,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 07:40:50,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:40:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:40:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:40:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 07:40:50,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:40:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:50,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564947196] [2022-04-05 07:40:50,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:50,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438978088] [2022-04-05 07:40:50,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438978088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:40:50,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:40:50,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:40:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125894589] [2022-04-05 07:40:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:40:50,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:40:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:40:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:40:50,449 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:40:50,646 INFO L93 Difference]: Finished difference Result 1700 states and 2539 transitions. [2022-04-05 07:40:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:40:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-05 07:40:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:40:50,652 INFO L225 Difference]: With dead ends: 1700 [2022-04-05 07:40:50,652 INFO L226 Difference]: Without dead ends: 1234 [2022-04-05 07:40:50,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:40:50,654 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:40:50,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 170 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:40:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-04-05 07:40:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-04-05 07:40:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-04-05 07:40:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-04-05 07:40:50,775 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-04-05 07:40:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:40:50,776 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-04-05 07:40:50,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 07:40:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-04-05 07:40:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 07:40:50,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:40:50,776 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:40:50,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 07:40:50,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 07:40:50,991 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:40:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:40:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-04-05 07:40:50,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:40:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947614895] [2022-04-05 07:40:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:50,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:40:51,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:40:51,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916207809] [2022-04-05 07:40:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:40:51,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:40:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:40:51,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:40:51,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 07:40:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:40:51,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 07:40:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:40:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 07:40:51,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:40:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 07:40:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:40:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947614895] [2022-04-05 07:40:52,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:40:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916207809] [2022-04-05 07:40:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916207809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:40:52,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:40:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-05 07:40:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811999213] [2022-04-05 07:40:52,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:40:52,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 07:40:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:40:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 07:40:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:40:52,433 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 07:40:55,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:40:58,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:02,770 INFO L93 Difference]: Finished difference Result 1412 states and 2014 transitions. [2022-04-05 07:41:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 07:41:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-04-05 07:41:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:02,777 INFO L225 Difference]: With dead ends: 1412 [2022-04-05 07:41:02,777 INFO L226 Difference]: Without dead ends: 1404 [2022-04-05 07:41:02,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 07:41:02,778 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 186 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:02,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 528 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-04-05 07:41:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-04-05 07:41:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-04-05 07:41:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-04-05 07:41:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-04-05 07:41:03,000 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-04-05 07:41:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:03,000 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-04-05 07:41:03,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 07:41:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-04-05 07:41:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 07:41:03,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:03,001 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:03,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:03,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 07:41:03,228 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-04-05 07:41:03,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:03,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489471074] [2022-04-05 07:41:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:03,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:03,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:03,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964918621] [2022-04-05 07:41:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:03,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:03,237 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:41:03,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 07:41:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 07:41:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 07:41:03,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 07:41:03,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:03,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489471074] [2022-04-05 07:41:03,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964918621] [2022-04-05 07:41:03,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964918621] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:03,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:03,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-05 07:41:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195444325] [2022-04-05 07:41:03,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:03,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 07:41:03,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 07:41:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-05 07:41:03,621 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 07:41:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:04,361 INFO L93 Difference]: Finished difference Result 2565 states and 3679 transitions. [2022-04-05 07:41:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 07:41:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-04-05 07:41:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:04,371 INFO L225 Difference]: With dead ends: 2565 [2022-04-05 07:41:04,371 INFO L226 Difference]: Without dead ends: 2543 [2022-04-05 07:41:04,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-04-05 07:41:04,372 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:04,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 488 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:41:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-04-05 07:41:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-04-05 07:41:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-04-05 07:41:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-04-05 07:41:04,844 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-04-05 07:41:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:04,844 INFO L478 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-04-05 07:41:04,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 07:41:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-04-05 07:41:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 07:41:04,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:04,845 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:04,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:05,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 07:41:05,060 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-04-05 07:41:05,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:05,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606682265] [2022-04-05 07:41:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:05,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823518895] [2022-04-05 07:41:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:05,073 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:41:05,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 07:41:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:41:05,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-05 07:41:05,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-05 07:41:05,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606682265] [2022-04-05 07:41:05,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823518895] [2022-04-05 07:41:05,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823518895] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:41:05,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:41:05,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-05 07:41:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144952507] [2022-04-05 07:41:05,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:05,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:41:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:41:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:41:05,479 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:41:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:05,890 INFO L93 Difference]: Finished difference Result 2467 states and 3485 transitions. [2022-04-05 07:41:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:41:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-04-05 07:41:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:05,900 INFO L225 Difference]: With dead ends: 2467 [2022-04-05 07:41:05,900 INFO L226 Difference]: Without dead ends: 2465 [2022-04-05 07:41:05,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:41:05,924 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:05,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 147 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:41:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-04-05 07:41:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-04-05 07:41:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-04-05 07:41:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-04-05 07:41:06,342 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-04-05 07:41:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:06,343 INFO L478 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-04-05 07:41:06,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:41:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-04-05 07:41:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-05 07:41:06,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:06,348 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:06,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:06,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:06,563 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-04-05 07:41:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:06,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717851495] [2022-04-05 07:41:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:06,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:06,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69355185] [2022-04-05 07:41:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:06,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:06,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:06,575 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:41:06,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 07:41:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 07:41:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 07:41:06,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:41:06,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717851495] [2022-04-05 07:41:06,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69355185] [2022-04-05 07:41:06,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69355185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:41:06,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:41:06,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:41:06,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007457151] [2022-04-05 07:41:06,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:06,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:41:06,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:41:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:41:06,728 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-05 07:41:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:07,267 INFO L93 Difference]: Finished difference Result 4377 states and 6175 transitions. [2022-04-05 07:41:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:41:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-04-05 07:41:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:07,277 INFO L225 Difference]: With dead ends: 4377 [2022-04-05 07:41:07,277 INFO L226 Difference]: Without dead ends: 2578 [2022-04-05 07:41:07,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:41:07,283 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:07,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:41:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-04-05 07:41:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-04-05 07:41:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-04-05 07:41:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-04-05 07:41:07,663 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-04-05 07:41:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:07,663 INFO L478 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-04-05 07:41:07,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-05 07:41:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-04-05 07:41:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 07:41:07,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:07,664 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-04-05 07:41:07,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:07,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:07,879 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-04-05 07:41:07,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:07,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171738194] [2022-04-05 07:41:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:07,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:07,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:07,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934239766] [2022-04-05 07:41:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:41:07,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:07,900 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:41:07,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 07:41:07,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:41:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:41:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-05 07:41:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-05 07:41:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-05 07:41:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171738194] [2022-04-05 07:41:10,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934239766] [2022-04-05 07:41:10,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934239766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:10,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-04-05 07:41:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030752601] [2022-04-05 07:41:10,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:10,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 07:41:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 07:41:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-04-05 07:41:10,185 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 07:41:22,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:24,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:26,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:32,044 INFO L93 Difference]: Finished difference Result 2869 states and 3894 transitions. [2022-04-05 07:41:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 07:41:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-04-05 07:41:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:32,055 INFO L225 Difference]: With dead ends: 2869 [2022-04-05 07:41:32,055 INFO L226 Difference]: Without dead ends: 2863 [2022-04-05 07:41:32,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 07:41:32,057 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 297 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 305 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:32,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 660 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1213 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2022-04-05 07:41:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-04-05 07:41:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-04-05 07:41:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-04-05 07:41:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-04-05 07:41:32,552 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-04-05 07:41:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:32,552 INFO L478 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-04-05 07:41:32,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 07:41:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-04-05 07:41:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-05 07:41:32,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:32,554 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1] [2022-04-05 07:41:32,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:32,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-05 07:41:32,767 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-04-05 07:41:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:32,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991342375] [2022-04-05 07:41:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:32,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321195257] [2022-04-05 07:41:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:32,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:32,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:41:32,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 07:41:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-05 07:41:32,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-05 07:41:34,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 07:41:39,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991342375] [2022-04-05 07:41:39,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321195257] [2022-04-05 07:41:39,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321195257] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:39,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:39,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-04-05 07:41:39,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724228595] [2022-04-05 07:41:39,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:39,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 07:41:39,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 07:41:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-04-05 07:41:39,043 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-05 07:41:53,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:55,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:02,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:14,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:18,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:26,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:32,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:34,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:37,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:45,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:46,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:50,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:52,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:42:54,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:00,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:43:10,255 INFO L93 Difference]: Finished difference Result 3529 states and 4842 transitions. [2022-04-05 07:43:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-05 07:43:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-04-05 07:43:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:43:10,268 INFO L225 Difference]: With dead ends: 3529 [2022-04-05 07:43:10,268 INFO L226 Difference]: Without dead ends: 3498 [2022-04-05 07:43:10,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=1770, Invalid=9150, Unknown=0, NotChecked=0, Total=10920 [2022-04-05 07:43:10,272 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 387 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 535 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:43:10,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 876 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1694 Invalid, 11 Unknown, 0 Unchecked, 45.1s Time] [2022-04-05 07:43:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2022-04-05 07:43:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3192. [2022-04-05 07:43:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3192 states, 2279 states have (on average 1.3027643703378675) internal successors, (2969), 2328 states have internal predecessors, (2969), 737 states have call successors, (737), 177 states have call predecessors, (737), 175 states have return successors, (730), 686 states have call predecessors, (730), 730 states have call successors, (730) [2022-04-05 07:43:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 4436 transitions. [2022-04-05 07:43:10,970 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 4436 transitions. Word has length 88 [2022-04-05 07:43:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:43:10,970 INFO L478 AbstractCegarLoop]: Abstraction has 3192 states and 4436 transitions. [2022-04-05 07:43:10,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-05 07:43:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 4436 transitions. [2022-04-05 07:43:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-05 07:43:10,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:43:10,972 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-05 07:43:10,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 07:43:11,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-05 07:43:11,197 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:43:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:43:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-04-05 07:43:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:43:11,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148279485] [2022-04-05 07:43:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:43:11,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:43:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163997689] [2022-04-05 07:43:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:43:11,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:43:11,209 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:43:11,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 07:43:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 07:43:11,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:43:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 07:43:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:43:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-05 07:43:11,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:43:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-05 07:43:12,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:43:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148279485] [2022-04-05 07:43:12,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:43:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163997689] [2022-04-05 07:43:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163997689] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:43:12,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:43:12,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 07:43:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648974579] [2022-04-05 07:43:12,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:43:12,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 07:43:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:43:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 07:43:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:43:12,165 INFO L87 Difference]: Start difference. First operand 3192 states and 4436 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-05 07:43:15,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:16,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:43:20,716 INFO L93 Difference]: Finished difference Result 3403 states and 4731 transitions. [2022-04-05 07:43:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 07:43:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-04-05 07:43:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:43:20,729 INFO L225 Difference]: With dead ends: 3403 [2022-04-05 07:43:20,730 INFO L226 Difference]: Without dead ends: 3391 [2022-04-05 07:43:20,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-04-05 07:43:20,731 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 112 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 135 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-04-05 07:43:20,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 519 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 676 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-04-05 07:43:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-04-05 07:43:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 3119. [2022-04-05 07:43:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3119 states, 2211 states have (on average 1.3021257349615558) internal successors, (2879), 2255 states have internal predecessors, (2879), 732 states have call successors, (732), 177 states have call predecessors, (732), 175 states have return successors, (730), 686 states have call predecessors, (730), 730 states have call successors, (730) [2022-04-05 07:43:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 4341 transitions. [2022-04-05 07:43:21,472 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 4341 transitions. Word has length 97 [2022-04-05 07:43:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:43:21,472 INFO L478 AbstractCegarLoop]: Abstraction has 3119 states and 4341 transitions. [2022-04-05 07:43:21,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-05 07:43:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 4341 transitions. [2022-04-05 07:43:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-05 07:43:21,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:43:21,474 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 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, 1, 1] [2022-04-05 07:43:21,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-05 07:43:21,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:21,680 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:43:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:43:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-04-05 07:43:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:43:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943773217] [2022-04-05 07:43:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:43:21,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:43:21,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200595056] [2022-04-05 07:43:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:21,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:21,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:43:21,692 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:43:21,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 07:43:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:43:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 07:43:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:43:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-05 07:43:21,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:43:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 07:43:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:43:22,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943773217] [2022-04-05 07:43:22,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:43:22,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200595056] [2022-04-05 07:43:22,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200595056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:43:22,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:43:22,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-05 07:43:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130135531] [2022-04-05 07:43:22,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:43:22,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 07:43:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:43:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 07:43:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 07:43:22,196 INFO L87 Difference]: Start difference. First operand 3119 states and 4341 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 07:43:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:43:24,076 INFO L93 Difference]: Finished difference Result 7132 states and 10399 transitions. [2022-04-05 07:43:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 07:43:24,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-04-05 07:43:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:43:24,101 INFO L225 Difference]: With dead ends: 7132 [2022-04-05 07:43:24,101 INFO L226 Difference]: Without dead ends: 6000 [2022-04-05 07:43:24,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 07:43:24,106 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 684 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 07:43:24,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 674 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 07:43:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2022-04-05 07:43:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 5690. [2022-04-05 07:43:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 3782 states have (on average 1.297197250132205) internal successors, (4906), 3804 states have internal predecessors, (4906), 1601 states have call successors, (1601), 308 states have call predecessors, (1601), 306 states have return successors, (1599), 1577 states have call predecessors, (1599), 1599 states have call successors, (1599) [2022-04-05 07:43:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8106 transitions. [2022-04-05 07:43:25,532 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8106 transitions. Word has length 98 [2022-04-05 07:43:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:43:25,533 INFO L478 AbstractCegarLoop]: Abstraction has 5690 states and 8106 transitions. [2022-04-05 07:43:25,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 07:43:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8106 transitions. [2022-04-05 07:43:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-05 07:43:25,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:43:25,536 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:43:25,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-05 07:43:25,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:25,736 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:43:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:43:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-04-05 07:43:25,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:43:25,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036597520] [2022-04-05 07:43:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:25,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:43:25,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:43:25,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586404407] [2022-04-05 07:43:25,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:43:25,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:43:25,749 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:43:25,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 07:43:25,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:43:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:43:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-05 07:43:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:43:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-05 07:43:26,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:43:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-05 07:43:28,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:43:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036597520] [2022-04-05 07:43:28,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:43:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586404407] [2022-04-05 07:43:28,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586404407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:43:28,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:43:28,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-05 07:43:28,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530629044] [2022-04-05 07:43:28,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:43:28,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 07:43:28,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:43:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 07:43:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-04-05 07:43:28,395 INFO L87 Difference]: Start difference. First operand 5690 states and 8106 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-05 07:43:32,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:35,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:39,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:41,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:43:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:43:43,044 INFO L93 Difference]: Finished difference Result 6730 states and 9551 transitions. [2022-04-05 07:43:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 07:43:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-04-05 07:43:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:43:43,068 INFO L225 Difference]: With dead ends: 6730 [2022-04-05 07:43:43,068 INFO L226 Difference]: Without dead ends: 6724 [2022-04-05 07:43:43,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 07:43:43,072 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 222 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 341 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:43:43,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 657 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1237 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2022-04-05 07:43:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2022-04-05 07:43:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 6108. [2022-04-05 07:43:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 3995 states have (on average 1.3053817271589487) internal successors, (5215), 4017 states have internal predecessors, (5215), 1781 states have call successors, (1781), 333 states have call predecessors, (1781), 331 states have return successors, (1779), 1757 states have call predecessors, (1779), 1779 states have call successors, (1779) [2022-04-05 07:43:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 8775 transitions. [2022-04-05 07:43:44,575 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 8775 transitions. Word has length 108 [2022-04-05 07:43:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:43:44,575 INFO L478 AbstractCegarLoop]: Abstraction has 6108 states and 8775 transitions. [2022-04-05 07:43:44,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-05 07:43:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 8775 transitions. [2022-04-05 07:43:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-05 07:43:44,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:43:44,577 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-04-05 07:43:44,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-05 07:43:44,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-05 07:43:44,800 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:43:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:43:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-04-05 07:43:44,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:43:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701069142] [2022-04-05 07:43:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:44,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:43:44,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:43:44,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390056823] [2022-04-05 07:43:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:43:44,816 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:43:44,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 07:43:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:43:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 07:43:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:43:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-05 07:43:45,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:43:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 07:43:45,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:43:45,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701069142] [2022-04-05 07:43:45,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:43:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390056823] [2022-04-05 07:43:45,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390056823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:43:45,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:43:45,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-05 07:43:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452847936] [2022-04-05 07:43:45,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:43:45,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 07:43:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:43:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 07:43:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 07:43:45,408 INFO L87 Difference]: Start difference. First operand 6108 states and 8775 transitions. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 07:43:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:43:47,325 INFO L93 Difference]: Finished difference Result 9669 states and 13969 transitions. [2022-04-05 07:43:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 07:43:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-04-05 07:43:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:43:47,342 INFO L225 Difference]: With dead ends: 9669 [2022-04-05 07:43:47,342 INFO L226 Difference]: Without dead ends: 6123 [2022-04-05 07:43:47,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 07:43:47,353 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 582 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 07:43:47,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 657 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 07:43:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6123 states. [2022-04-05 07:43:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6123 to 6050. [2022-04-05 07:43:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 3973 states have (on average 1.2139441228290964) internal successors, (4823), 3989 states have internal predecessors, (4823), 1745 states have call successors, (1745), 333 states have call predecessors, (1745), 331 states have return successors, (1743), 1727 states have call predecessors, (1743), 1743 states have call successors, (1743) [2022-04-05 07:43:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 8311 transitions. [2022-04-05 07:43:48,844 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 8311 transitions. Word has length 105 [2022-04-05 07:43:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:43:48,844 INFO L478 AbstractCegarLoop]: Abstraction has 6050 states and 8311 transitions. [2022-04-05 07:43:48,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 07:43:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 8311 transitions. [2022-04-05 07:43:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-05 07:43:48,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:43:48,848 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:43:48,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 07:43:49,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-05 07:43:49,076 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:43:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:43:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-04-05 07:43:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:43:49,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308534246] [2022-04-05 07:43:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:43:49,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:43:49,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762451531] [2022-04-05 07:43:49,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:43:49,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:49,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:43:49,090 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:43:49,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 07:43:49,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:43:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:43:49,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 07:43:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:43:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-05 07:43:49,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:43:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-05 07:43:49,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:43:49,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308534246] [2022-04-05 07:43:49,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:43:49,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762451531] [2022-04-05 07:43:49,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762451531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:43:49,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:43:49,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-04-05 07:43:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5534969] [2022-04-05 07:43:49,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:43:49,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 07:43:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:43:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 07:43:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 07:43:49,810 INFO L87 Difference]: Start difference. First operand 6050 states and 8311 transitions. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-04-05 07:43:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:43:51,777 INFO L93 Difference]: Finished difference Result 6134 states and 8391 transitions. [2022-04-05 07:43:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 07:43:51,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) Word has length 132 [2022-04-05 07:43:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:43:51,793 INFO L225 Difference]: With dead ends: 6134 [2022-04-05 07:43:51,793 INFO L226 Difference]: Without dead ends: 6129 [2022-04-05 07:43:51,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=592, Invalid=1048, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 07:43:51,796 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 614 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 07:43:51,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 535 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 07:43:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2022-04-05 07:43:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 6084. [2022-04-05 07:43:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6084 states, 4007 states have (on average 1.2046418767157474) internal successors, (4827), 4023 states have internal predecessors, (4827), 1745 states have call successors, (1745), 333 states have call predecessors, (1745), 331 states have return successors, (1743), 1727 states have call predecessors, (1743), 1743 states have call successors, (1743) [2022-04-05 07:43:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 8315 transitions. [2022-04-05 07:43:53,401 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 8315 transitions. Word has length 132 [2022-04-05 07:43:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:43:53,401 INFO L478 AbstractCegarLoop]: Abstraction has 6084 states and 8315 transitions. [2022-04-05 07:43:53,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-04-05 07:43:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 8315 transitions. [2022-04-05 07:43:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-05 07:43:53,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:43:53,405 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-04-05 07:43:53,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-05 07:43:53,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-05 07:43:53,628 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:43:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:43:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1118265052, now seen corresponding path program 3 times [2022-04-05 07:43:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:43:53,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393760814] [2022-04-05 07:43:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:43:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:43:53,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:43:53,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949340242] [2022-04-05 07:43:53,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:43:53,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:43:53,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:43:53,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:43:53,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 07:43:53,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 07:43:53,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:43:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-05 07:43:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:43:54,906 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:43:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 90 proven. 51 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-04-05 07:43:55,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:44:02,218 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:44:06,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:44:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393760814] [2022-04-05 07:44:06,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:44:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949340242] [2022-04-05 07:44:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949340242] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:44:06,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:44:06,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-05 07:44:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359324876] [2022-04-05 07:44:06,582 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:44:06,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 07:44:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:44:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 07:44:06,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=466, Unknown=4, NotChecked=0, Total=552 [2022-04-05 07:44:06,583 INFO L87 Difference]: Start difference. First operand 6084 states and 8315 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-05 07:44:11,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:14,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:16,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:18,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:21,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:23,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:25,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:32,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:34,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:36,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:37,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:44:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:44:39,598 INFO L93 Difference]: Finished difference Result 7017 states and 9566 transitions. [2022-04-05 07:44:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 07:44:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 138 [2022-04-05 07:44:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:44:39,615 INFO L225 Difference]: With dead ends: 7017 [2022-04-05 07:44:39,615 INFO L226 Difference]: Without dead ends: 7012 [2022-04-05 07:44:39,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=170, Invalid=945, Unknown=7, NotChecked=0, Total=1122 [2022-04-05 07:44:39,618 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 102 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 94 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-04-05 07:44:39,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 717 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1170 Invalid, 10 Unknown, 0 Unchecked, 24.4s Time] [2022-04-05 07:44:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7012 states. [2022-04-05 07:44:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7012 to 6834. [2022-04-05 07:44:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6834 states, 4482 states have (on average 1.2052655064703257) internal successors, (5402), 4498 states have internal predecessors, (5402), 1985 states have call successors, (1985), 368 states have call predecessors, (1985), 366 states have return successors, (1983), 1967 states have call predecessors, (1983), 1983 states have call successors, (1983) [2022-04-05 07:44:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 9370 transitions. [2022-04-05 07:44:41,427 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 9370 transitions. Word has length 138 [2022-04-05 07:44:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:44:41,427 INFO L478 AbstractCegarLoop]: Abstraction has 6834 states and 9370 transitions. [2022-04-05 07:44:41,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-05 07:44:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 9370 transitions. [2022-04-05 07:44:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-05 07:44:41,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:44:41,432 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:44:41,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 07:44:41,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-05 07:44:41,655 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:44:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:44:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1657425713, now seen corresponding path program 4 times [2022-04-05 07:44:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:44:41,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493024542] [2022-04-05 07:44:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:44:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:44:41,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:44:41,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633860180] [2022-04-05 07:44:41,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 07:44:41,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:44:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:44:41,663 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:44:41,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 07:44:41,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 07:44:41,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:44:41,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-05 07:44:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:44:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 95 proven. 148 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-04-05 07:44:43,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:44:43,435 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:44:45,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:44:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493024542] [2022-04-05 07:44:45,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:44:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633860180] [2022-04-05 07:44:45,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633860180] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:44:45,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:44:45,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-05 07:44:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036788259] [2022-04-05 07:44:45,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:44:45,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 07:44:45,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:44:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 07:44:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-04-05 07:44:45,947 INFO L87 Difference]: Start difference. First operand 6834 states and 9370 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 07:44:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:44:49,636 INFO L93 Difference]: Finished difference Result 7197 states and 9819 transitions. [2022-04-05 07:44:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 07:44:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 145 [2022-04-05 07:44:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:44:49,654 INFO L225 Difference]: With dead ends: 7197 [2022-04-05 07:44:49,654 INFO L226 Difference]: Without dead ends: 7192 [2022-04-05 07:44:49,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 07:44:49,662 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 132 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:44:49,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1002 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 07:44:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7192 states. [2022-04-05 07:44:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7192 to 7071. [2022-04-05 07:44:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 4629 states have (on average 1.2050118816158997) internal successors, (5578), 4645 states have internal predecessors, (5578), 2057 states have call successors, (2057), 386 states have call predecessors, (2057), 384 states have return successors, (2055), 2039 states have call predecessors, (2055), 2055 states have call successors, (2055) [2022-04-05 07:44:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 9690 transitions. [2022-04-05 07:44:51,492 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 9690 transitions. Word has length 145 [2022-04-05 07:44:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:44:51,493 INFO L478 AbstractCegarLoop]: Abstraction has 7071 states and 9690 transitions. [2022-04-05 07:44:51,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 07:44:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 9690 transitions. [2022-04-05 07:44:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-05 07:44:51,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:44:51,498 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:44:51,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-05 07:44:51,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-05 07:44:51,711 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:44:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:44:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1291712014, now seen corresponding path program 5 times [2022-04-05 07:44:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:44:51,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735647597] [2022-04-05 07:44:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:44:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:44:51,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:44:51,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452764368] [2022-04-05 07:44:51,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 07:44:51,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:44:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:44:51,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:44:51,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 07:44:52,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-05 07:44:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:44:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-05 07:44:52,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:44:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 77 proven. 170 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-04-05 07:44:53,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:45:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-04-05 07:45:02,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:45:02,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735647597] [2022-04-05 07:45:02,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:45:02,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452764368] [2022-04-05 07:45:02,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452764368] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:45:02,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:45:02,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-04-05 07:45:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373449682] [2022-04-05 07:45:02,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:45:02,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 07:45:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:45:02,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 07:45:02,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 07:45:02,217 INFO L87 Difference]: Start difference. First operand 7071 states and 9690 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-04-05 07:45:16,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:45:22,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:45:24,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:45:26,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:45:36,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:45:57,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:05,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:07,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:23,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:29,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:34,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:46,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:46:48,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:47:16,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:47:18,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:47:42,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:47:49,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:47:52,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:47:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:47:52,126 INFO L93 Difference]: Finished difference Result 9835 states and 13660 transitions. [2022-04-05 07:47:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-05 07:47:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 161 [2022-04-05 07:47:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:47:52,148 INFO L225 Difference]: With dead ends: 9835 [2022-04-05 07:47:52,148 INFO L226 Difference]: Without dead ends: 9829 [2022-04-05 07:47:52,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4036 ImplicationChecksByTransitivity, 77.6s TimeCoverageRelationStatistics Valid=2343, Invalid=10766, Unknown=1, NotChecked=0, Total=13110 [2022-04-05 07:47:52,154 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 422 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 941 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 4549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.3s IncrementalHoareTripleChecker+Time [2022-04-05 07:47:52,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1504 Invalid, 4549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 3594 Invalid, 14 Unknown, 0 Unchecked, 94.3s Time] [2022-04-05 07:47:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9829 states. [2022-04-05 07:47:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9829 to 8223. [2022-04-05 07:47:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8223 states, 5351 states have (on average 1.2164081480097177) internal successors, (6509), 5369 states have internal predecessors, (6509), 2429 states have call successors, (2429), 444 states have call predecessors, (2429), 442 states have return successors, (2427), 2409 states have call predecessors, (2427), 2427 states have call successors, (2427) [2022-04-05 07:47:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 11365 transitions. [2022-04-05 07:47:55,327 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 11365 transitions. Word has length 161 [2022-04-05 07:47:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:47:55,328 INFO L478 AbstractCegarLoop]: Abstraction has 8223 states and 11365 transitions. [2022-04-05 07:47:55,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-04-05 07:47:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 11365 transitions. [2022-04-05 07:47:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-04-05 07:47:55,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:47:55,335 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:47:55,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-05 07:47:55,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:47:55,545 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:47:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:47:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1604879327, now seen corresponding path program 6 times [2022-04-05 07:47:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:47:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990239497] [2022-04-05 07:47:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:47:55,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:47:55,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:47:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621360182] [2022-04-05 07:47:55,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 07:47:55,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:47:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:47:55,554 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:47:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 07:47:56,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 07:47:56,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:47:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-05 07:47:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:48:23,217 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:48:23,222 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:48:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 136 proven. 121 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2022-04-05 07:48:38,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:48:44,473 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:48:47,591 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:49:43,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990239497] [2022-04-05 07:49:43,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621360182] [2022-04-05 07:49:43,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621360182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:49:43,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:49:43,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-05 07:49:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997926746] [2022-04-05 07:49:43,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:43,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 07:49:43,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 07:49:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1069, Unknown=10, NotChecked=0, Total=1260 [2022-04-05 07:49:43,996 INFO L87 Difference]: Start difference. First operand 8223 states and 11365 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-05 07:49:56,311 WARN L232 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 55 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:50:07,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:09,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:11,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:17,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:19,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:20,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:50:23,509 INFO L93 Difference]: Finished difference Result 9011 states and 12387 transitions. [2022-04-05 07:50:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 07:50:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 168 [2022-04-05 07:50:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:50:23,530 INFO L225 Difference]: With dead ends: 9011 [2022-04-05 07:50:23,530 INFO L226 Difference]: Without dead ends: 9006 [2022-04-05 07:50:23,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 87.4s TimeCoverageRelationStatistics Valid=370, Invalid=2169, Unknown=11, NotChecked=0, Total=2550 [2022-04-05 07:50:23,533 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 128 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-04-05 07:50:23,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1266 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-04-05 07:50:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9006 states. [2022-04-05 07:50:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9006 to 8843. [2022-04-05 07:50:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 5753 states have (on average 1.2153658960542326) internal successors, (6992), 5771 states have internal predecessors, (6992), 2609 states have call successors, (2609), 482 states have call predecessors, (2609), 480 states have return successors, (2607), 2589 states have call predecessors, (2607), 2607 states have call successors, (2607) [2022-04-05 07:50:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 12208 transitions. [2022-04-05 07:50:27,225 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 12208 transitions. Word has length 168 [2022-04-05 07:50:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:50:27,225 INFO L478 AbstractCegarLoop]: Abstraction has 8843 states and 12208 transitions. [2022-04-05 07:50:27,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-05 07:50:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 12208 transitions. [2022-04-05 07:50:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-05 07:50:27,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:50:27,235 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 10, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:50:27,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-05 07:50:27,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-05 07:50:27,441 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:50:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:50:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1364196507, now seen corresponding path program 1 times [2022-04-05 07:50:27,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:50:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056273043] [2022-04-05 07:50:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:27,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:50:27,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:50:27,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461112341] [2022-04-05 07:50:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:27,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:50:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:50:27,455 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:50:27,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-05 07:50:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 07:50:27,658 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-05 07:50:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 07:50:27,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-05 07:50:27,899 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-05 07:50:27,899 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 07:50:27,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-05 07:50:28,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:50:28,110 INFO L719 BasicCegarLoop]: Path program histogram: [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:50:28,113 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 07:50:28,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:50:28 BasicIcfg [2022-04-05 07:50:28,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 07:50:28,230 INFO L158 Benchmark]: Toolchain (without parser) took 588683.89ms. Allocated memory was 187.7MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 136.4MB in the beginning and 1.1GB in the end (delta: -954.5MB). Peak memory consumption was 167.4MB. Max. memory is 8.0GB. [2022-04-05 07:50:28,230 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory is still 152.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 07:50:28,230 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.96ms. Allocated memory is still 187.7MB. Free memory was 136.2MB in the beginning and 162.7MB in the end (delta: -26.5MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-04-05 07:50:28,231 INFO L158 Benchmark]: Boogie Preprocessor took 30.42ms. Allocated memory is still 187.7MB. Free memory was 162.7MB in the beginning and 161.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 07:50:28,231 INFO L158 Benchmark]: RCFGBuilder took 289.22ms. Allocated memory is still 187.7MB. Free memory was 161.2MB in the beginning and 149.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-05 07:50:28,231 INFO L158 Benchmark]: IcfgTransformer took 46.36ms. Allocated memory is still 187.7MB. Free memory was 149.1MB in the beginning and 147.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 07:50:28,231 INFO L158 Benchmark]: TraceAbstraction took 588042.68ms. Allocated memory was 187.7MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 147.0MB in the beginning and 1.1GB in the end (delta: -943.9MB). Peak memory consumption was 177.5MB. Max. memory is 8.0GB. [2022-04-05 07:50:28,232 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 187.7MB. Free memory is still 152.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 268.96ms. Allocated memory is still 187.7MB. Free memory was 136.2MB in the beginning and 162.7MB in the end (delta: -26.5MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.42ms. Allocated memory is still 187.7MB. Free memory was 162.7MB in the beginning and 161.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 289.22ms. Allocated memory is still 187.7MB. Free memory was 161.2MB in the beginning and 149.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 46.36ms. Allocated memory is still 187.7MB. Free memory was 149.1MB in the beginning and 147.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 588042.68ms. Allocated memory was 187.7MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 147.0MB in the beginning and 1.1GB in the end (delta: -943.9MB). Peak memory consumption was 177.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=27, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=13, b=21, counter=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=21, c=13, counter=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=21, b=13, c=13, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=13, b=8, c=8, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] COND FALSE !(counter++<20) [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] COND FALSE !(counter++<20) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] COND FALSE !(counter++<20) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=23] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 587.8s, OverallIterations: 32, TraceHistogramMax: 21, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 403.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 42 mSolverCounterUnknown, 5560 SdHoareTripleChecker+Valid, 225.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5430 mSDsluCounter, 13741 SdHoareTripleChecker+Invalid, 223.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11635 mSDsCounter, 4672 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17741 IncrementalHoareTripleChecker+Invalid, 22455 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4672 mSolverCounterUnsat, 2106 mSDtfsCounter, 17741 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4008 GetRequests, 3194 SyntacticMatches, 25 SemanticMatches, 789 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11027 ImplicationChecksByTransitivity, 246.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8843occurred in iteration=31, InterpolantAutomatonStates: 650, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 20.6s AutomataMinimizationTime, 31 MinimizatonAttempts, 4894 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 153.2s InterpolantComputationTime, 2302 NumberOfCodeBlocks, 2148 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 3352 ConstructedInterpolants, 0 QuantifiedInterpolants, 27570 SizeOfPredicates, 225 NumberOfNonLiveVariables, 6345 ConjunctsInSsa, 1003 ConjunctsInUnsatCore, 48 InterpolantComputations, 12 PerfectInterpolantSequences, 6055/7830 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! [2022-04-05 07:50:28,375 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...