/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:54:29,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:54:29,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:54:29,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:54:29,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:54:29,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:54:29,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:54:29,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:54:29,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:54:29,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:54:29,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:54:29,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:54:29,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:54:29,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:54:29,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:54:29,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:54:29,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:54:29,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:54:29,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:54:29,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:54:29,863 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:54:29,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:54:29,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:54:29,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:54:29,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:54:29,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:54:29,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:54:29,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:54:29,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:54:29,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:54:29,892 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:54:29,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:54:29,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:54:29,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:54:29,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:54:29,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:54:29,893 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:54:29,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:54:29,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:54:29,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:54:29,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:54:29,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:54:29,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:54:29,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:54:29,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:54:29,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:54:29,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:54:29,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:54:29,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:54:29,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:54:29,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:54:29,897 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:54:29,897 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:54:30,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:54:30,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:54:30,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:54:30,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:54:30,091 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:54:30,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-04-06 11:54:30,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5fc2523b/2c8b21e4960049a38708b19399a041f9/FLAGd5ec60a47 [2022-04-06 11:54:30,460 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:54:30,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-04-06 11:54:30,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5fc2523b/2c8b21e4960049a38708b19399a041f9/FLAGd5ec60a47 [2022-04-06 11:54:30,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5fc2523b/2c8b21e4960049a38708b19399a041f9 [2022-04-06 11:54:30,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:54:30,870 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:54:30,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:54:30,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:54:30,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:54:30,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:54:30" (1/1) ... [2022-04-06 11:54:30,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eeb5524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:30, skipping insertion in model container [2022-04-06 11:54:30,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:54:30" (1/1) ... [2022-04-06 11:54:30,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:54:30,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:54:30,997 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_valuebound50.c[490,503] [2022-04-06 11:54:31,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:54:31,014 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:54:31,021 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_valuebound50.c[490,503] [2022-04-06 11:54:31,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:54:31,064 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:54:31,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31 WrapperNode [2022-04-06 11:54:31,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:54:31,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:54:31,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:54:31,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:54:31,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:54:31,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:54:31,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:54:31,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:54:31,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:54:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:31,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 11:54:31,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 11:54:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:54:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:54:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:54:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:54:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:54:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:54:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:54:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:54:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:54:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:54:31,190 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:54:31,191 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:54:31,380 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:54:31,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:54:31,385 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 11:54:31,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:54:31 BoogieIcfgContainer [2022-04-06 11:54:31,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:54:31,386 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:54:31,386 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:54:31,387 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:54:31,389 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:54:31" (1/1) ... [2022-04-06 11:54:31,390 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:54:31,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:54:31 BasicIcfg [2022-04-06 11:54:31,404 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:54:31,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:54:31,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:54:31,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:54:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:54:30" (1/4) ... [2022-04-06 11:54:31,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c37c4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:54:31, skipping insertion in model container [2022-04-06 11:54:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:54:31" (2/4) ... [2022-04-06 11:54:31,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c37c4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:54:31, skipping insertion in model container [2022-04-06 11:54:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:54:31" (3/4) ... [2022-04-06 11:54:31,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c37c4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:54:31, skipping insertion in model container [2022-04-06 11:54:31,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:54:31" (4/4) ... [2022-04-06 11:54:31,409 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.cqvasr [2022-04-06 11:54:31,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:54:31,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:54:31,465 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:54:31,476 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 11:54:31,477 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:54:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 11:54:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 11:54:31,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:31,501 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:31,502 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-06 11:54:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:31,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338447343] [2022-04-06 11:54:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:31,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:54:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:54:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 11:54:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 11:54:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 11:54:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:54:31,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338447343] [2022-04-06 11:54:31,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338447343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:54:31,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:54:31,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:54:31,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087323262] [2022-04-06 11:54:31,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:31,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:54:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:54:31,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:54:31,723 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:54:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:31,800 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-04-06 11:54:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:54:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 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 33 [2022-04-06 11:54:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:31,809 INFO L225 Difference]: With dead ends: 73 [2022-04-06 11:54:31,810 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 11:54:31,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:54:31,817 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:31,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 11:54:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 11:54:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 11:54:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 11:54:31,853 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-06 11:54:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:31,853 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 11:54:31,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:54:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 11:54:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 11:54:31,856 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:31,856 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:31,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:54:31,857 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:31,859 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-06 11:54:31,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:31,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070921224] [2022-04-06 11:54:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:31,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:31,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:31,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146491524] [2022-04-06 11:54:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:31,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:31,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:31,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:54:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:54:31,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:54:32,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:54:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070921224] [2022-04-06 11:54:32,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146491524] [2022-04-06 11:54:32,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146491524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:54:32,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:54:32,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 11:54:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294075860] [2022-04-06 11:54:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:32,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:54:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:54:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:54:32,102 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:54:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:32,189 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-06 11:54:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:54:32,190 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-06 11:54:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:32,191 INFO L225 Difference]: With dead ends: 54 [2022-04-06 11:54:32,191 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 11:54:32,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:54:32,192 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:32,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:54:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 11:54:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-06 11:54:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 11:54:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 11:54:32,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-06 11:54:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:32,200 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 11:54:32,200 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:54:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 11:54:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 11:54:32,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:32,201 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:32,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:32,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:32,416 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:32,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-06 11:54:32,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138644650] [2022-04-06 11:54:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:32,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:32,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975208822] [2022-04-06 11:54:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:32,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:32,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:54:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:32,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 11:54:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:54:32,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:54:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138644650] [2022-04-06 11:54:32,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975208822] [2022-04-06 11:54:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975208822] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:54:32,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:54:32,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 11:54:32,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467528521] [2022-04-06 11:54:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:32,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:54:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:54:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:54:32,842 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:54:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:32,890 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-04-06 11:54:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:54:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-06 11:54:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:32,893 INFO L225 Difference]: With dead ends: 53 [2022-04-06 11:54:32,893 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 11:54:32,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:54:32,896 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:32,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 11:54:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 11:54:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 11:54:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-06 11:54:32,910 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-06 11:54:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:32,910 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-06 11:54:32,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:54:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-06 11:54:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 11:54:32,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:32,912 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:32,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:33,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 11:54:33,120 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-06 11:54:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:33,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371405872] [2022-04-06 11:54:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:33,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:33,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202177963] [2022-04-06 11:54:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:33,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:33,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:33,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:33,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:54:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:54:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:54:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:54:33,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371405872] [2022-04-06 11:54:33,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202177963] [2022-04-06 11:54:33,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202177963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:54:33,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:54:33,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 11:54:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767040487] [2022-04-06 11:54:33,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:54:33,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:54:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:54:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:54:33,366 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 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) [2022-04-06 11:54:33,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:33,509 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-04-06 11:54:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:54:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 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 39 [2022-04-06 11:54:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:33,511 INFO L225 Difference]: With dead ends: 103 [2022-04-06 11:54:33,511 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 11:54:33,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:54:33,512 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:33,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 238 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:54:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 11:54:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-06 11:54:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 11:54:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-06 11:54:33,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-06 11:54:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:33,530 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-06 11:54:33,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 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) [2022-04-06 11:54:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-06 11:54:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 11:54:33,531 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:33,531 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:33,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:33,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:33,731 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-06 11:54:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:33,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974618729] [2022-04-06 11:54:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:33,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:33,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82847472] [2022-04-06 11:54:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:33,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:33,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:33,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:33,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:54:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:33,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 11:54:33,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:54:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:54:34,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974618729] [2022-04-06 11:54:34,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82847472] [2022-04-06 11:54:34,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82847472] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:54:34,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:54:34,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-06 11:54:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979196427] [2022-04-06 11:54:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:34,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:54:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:54:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:54:34,172 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-04-06 11:54:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:34,227 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-04-06 11:54:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:54:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 42 [2022-04-06 11:54:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:34,231 INFO L225 Difference]: With dead ends: 79 [2022-04-06 11:54:34,231 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 11:54:34,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:54:34,232 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:34,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 169 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 11:54:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-06 11:54:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 11:54:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-06 11:54:34,258 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-06 11:54:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:34,259 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-06 11:54:34,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-04-06 11:54:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-06 11:54:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 11:54:34,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:34,263 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 11:54:34,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:34,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:34,464 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-06 11:54:34,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:34,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781746972] [2022-04-06 11:54:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:34,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282287668] [2022-04-06 11:54:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:34,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:34,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:34,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:54:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 11:54:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 11:54:34,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:54:34,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:34,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781746972] [2022-04-06 11:54:34,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:34,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282287668] [2022-04-06 11:54:34,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282287668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:54:34,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:54:34,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-04-06 11:54:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697488452] [2022-04-06 11:54:34,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:54:34,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:54:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:34,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:54:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:54:34,913 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 11:54:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:35,308 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-04-06 11:54:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 11:54:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-04-06 11:54:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:35,310 INFO L225 Difference]: With dead ends: 118 [2022-04-06 11:54:35,310 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 11:54:35,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-04-06 11:54:35,311 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:35,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 255 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:54:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 11:54:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-04-06 11:54:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 11:54:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-04-06 11:54:35,322 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-04-06 11:54:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:35,323 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-04-06 11:54:35,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 11:54:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-04-06 11:54:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:54:35,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:35,324 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:35,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:35,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:35,539 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-06 11:54:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:35,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469768486] [2022-04-06 11:54:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:35,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:35,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229270020] [2022-04-06 11:54:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:35,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:35,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:35,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:35,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:54:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:54:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 11:54:35,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:54:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469768486] [2022-04-06 11:54:35,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229270020] [2022-04-06 11:54:35,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229270020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:54:35,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:54:35,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:54:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008112248] [2022-04-06 11:54:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:35,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:54:35,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:54:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:54:35,658 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-04-06 11:54:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:35,697 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-04-06 11:54:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:54:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 47 [2022-04-06 11:54:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:35,700 INFO L225 Difference]: With dead ends: 151 [2022-04-06 11:54:35,700 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 11:54:35,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:54:35,701 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 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 [2022-04-06 11:54:35,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 11:54:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-04-06 11:54:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 11:54:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-04-06 11:54:35,723 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-04-06 11:54:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:35,723 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-04-06 11:54:35,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-04-06 11:54:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-04-06 11:54:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:54:35,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:35,724 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 11:54:35,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:35,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:35,928 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-04-06 11:54:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821173396] [2022-04-06 11:54:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:35,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:35,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:35,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098970507] [2022-04-06 11:54:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:35,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:35,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:35,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:54:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 11:54:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 11:54:36,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:54:36,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821173396] [2022-04-06 11:54:36,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098970507] [2022-04-06 11:54:36,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098970507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:54:36,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:54:36,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-04-06 11:54:36,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549628964] [2022-04-06 11:54:36,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:54:36,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 11:54:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 11:54:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-06 11:54:36,411 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 11:54:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:37,457 INFO L93 Difference]: Finished difference Result 194 states and 277 transitions. [2022-04-06 11:54:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 11:54:37,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-04-06 11:54:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:37,459 INFO L225 Difference]: With dead ends: 194 [2022-04-06 11:54:37,460 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 11:54:37,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-04-06 11:54:37,460 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:37,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 432 Invalid, 0 Unknown, 84 Unchecked, 0.5s Time] [2022-04-06 11:54:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 11:54:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 166. [2022-04-06 11:54:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 108 states have internal predecessors, (132), 53 states have call successors, (53), 9 states have call predecessors, (53), 8 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:54:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2022-04-06 11:54:37,478 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 47 [2022-04-06 11:54:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:37,479 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2022-04-06 11:54:37,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 11:54:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2022-04-06 11:54:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 11:54:37,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:37,479 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:37,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:37,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:37,695 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-04-06 11:54:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:37,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791421147] [2022-04-06 11:54:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:37,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:37,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434161653] [2022-04-06 11:54:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:54:37,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:37,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:37,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:54:37,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:54:37,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:54:37,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:54:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 11:54:37,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:54:37,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:37,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791421147] [2022-04-06 11:54:37,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:37,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434161653] [2022-04-06 11:54:37,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434161653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:54:37,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:54:37,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:54:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119950555] [2022-04-06 11:54:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:37,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:54:37,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:54:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:54:37,798 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:54:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:37,877 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2022-04-06 11:54:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:54:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-06 11:54:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:37,879 INFO L225 Difference]: With dead ends: 212 [2022-04-06 11:54:37,879 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 11:54:37,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:54:37,883 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:37,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 11:54:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-04-06 11:54:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 11:54:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-04-06 11:54:37,903 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 47 [2022-04-06 11:54:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:37,904 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-04-06 11:54:37,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 11:54:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-04-06 11:54:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 11:54:37,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:37,905 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:38,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 11:54:38,116 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-06 11:54:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:38,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6954139] [2022-04-06 11:54:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:38,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:38,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583033890] [2022-04-06 11:54:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:38,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:38,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:54:38,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:54:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:54:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 11:54:38,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:54:38,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6954139] [2022-04-06 11:54:38,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583033890] [2022-04-06 11:54:38,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583033890] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:54:38,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:54:38,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:54:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505485140] [2022-04-06 11:54:38,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:38,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:54:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:54:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:54:38,239 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 11:54:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:38,283 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2022-04-06 11:54:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:54:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-06 11:54:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:38,285 INFO L225 Difference]: With dead ends: 163 [2022-04-06 11:54:38,285 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 11:54:38,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:54:38,285 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 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 [2022-04-06 11:54:38,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 11:54:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-04-06 11:54:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 85 states have internal predecessors, (90), 57 states have call successors, (57), 10 states have call predecessors, (57), 9 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 11:54:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2022-04-06 11:54:38,302 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 52 [2022-04-06 11:54:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:38,302 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2022-04-06 11:54:38,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 11:54:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2022-04-06 11:54:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 11:54:38,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:38,303 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:38,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:38,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 11:54:38,519 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-06 11:54:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:38,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718701386] [2022-04-06 11:54:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:38,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:38,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:38,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661643825] [2022-04-06 11:54:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:38,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:38,529 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) [2022-04-06 11:54:38,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:54:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 11:54:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:54:38,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 11:54:39,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:39,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718701386] [2022-04-06 11:54:39,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:39,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661643825] [2022-04-06 11:54:39,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661643825] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:54:39,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:54:39,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 11:54:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453151219] [2022-04-06 11:54:39,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:54:39,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:54:39,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:54:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:54:39,305 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:54:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:43,198 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-04-06 11:54:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 11:54:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-04-06 11:54:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:43,200 INFO L225 Difference]: With dead ends: 331 [2022-04-06 11:54:43,200 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 11:54:43,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 11:54:43,201 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 148 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:43,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 373 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 11:54:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 11:54:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-04-06 11:54:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 11:54:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-04-06 11:54:43,252 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-04-06 11:54:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:43,253 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-04-06 11:54:43,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:54:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-04-06 11:54:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 11:54:43,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:43,253 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1] [2022-04-06 11:54:43,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:43,461 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 [2022-04-06 11:54:43,462 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-04-06 11:54:43,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:43,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785534595] [2022-04-06 11:54:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:43,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:43,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:43,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965007404] [2022-04-06 11:54:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:43,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:43,478 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) [2022-04-06 11:54:43,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:54:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 11:54:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 11:54:43,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 11:54:43,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:43,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785534595] [2022-04-06 11:54:43,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:43,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965007404] [2022-04-06 11:54:43,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965007404] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:54:43,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:54:43,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 11:54:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293147066] [2022-04-06 11:54:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:43,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:54:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:54:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:54:43,731 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 11:54:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:43,823 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-04-06 11:54:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:54:43,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-04-06 11:54:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:43,828 INFO L225 Difference]: With dead ends: 256 [2022-04-06 11:54:43,828 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 11:54:43,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:54:43,829 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 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 [2022-04-06 11:54:43,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 11:54:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-04-06 11:54:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 11:54:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-04-06 11:54:43,872 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-04-06 11:54:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:43,873 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-04-06 11:54:43,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 11:54:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-04-06 11:54:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 11:54:43,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:43,874 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:43,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:44,080 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 [2022-04-06 11:54:44,080 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:44,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-04-06 11:54:44,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:44,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524068722] [2022-04-06 11:54:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:44,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:44,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481328793] [2022-04-06 11:54:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:44,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:44,089 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) [2022-04-06 11:54:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:54:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:54:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 11:54:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 11:54:44,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 11:54:44,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:44,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524068722] [2022-04-06 11:54:44,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:44,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481328793] [2022-04-06 11:54:44,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481328793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:54:44,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:54:44,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 11:54:44,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135750292] [2022-04-06 11:54:44,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:54:44,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 11:54:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 11:54:44,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:54:44,548 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:54:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:45,007 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2022-04-06 11:54:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:54:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-04-06 11:54:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:45,010 INFO L225 Difference]: With dead ends: 323 [2022-04-06 11:54:45,011 INFO L226 Difference]: Without dead ends: 321 [2022-04-06 11:54:45,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-06 11:54:45,011 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 73 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:45,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 270 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 11:54:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-06 11:54:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 258. [2022-04-06 11:54:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 159 states have internal predecessors, (181), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 11:54:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 357 transitions. [2022-04-06 11:54:45,068 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 357 transitions. Word has length 72 [2022-04-06 11:54:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:45,069 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 357 transitions. [2022-04-06 11:54:45,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 11:54:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 357 transitions. [2022-04-06 11:54:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 11:54:45,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:45,073 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:54:45,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:45,287 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 [2022-04-06 11:54:45,287 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-04-06 11:54:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:45,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454147554] [2022-04-06 11:54:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:45,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:45,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083309953] [2022-04-06 11:54:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:54:45,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:45,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:45,302 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) [2022-04-06 11:54:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:54:45,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:54:45,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:54:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 11:54:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:54:45,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:54:45,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454147554] [2022-04-06 11:54:45,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083309953] [2022-04-06 11:54:45,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083309953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:54:45,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:54:45,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:54:45,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100697583] [2022-04-06 11:54:45,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:54:45,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:54:45,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:54:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:54:45,441 INFO L87 Difference]: Start difference. First operand 258 states and 357 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 11:54:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:54:45,541 INFO L93 Difference]: Finished difference Result 444 states and 610 transitions. [2022-04-06 11:54:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:54:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-06 11:54:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:54:45,543 INFO L225 Difference]: With dead ends: 444 [2022-04-06 11:54:45,543 INFO L226 Difference]: Without dead ends: 266 [2022-04-06 11:54:45,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:54:45,544 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:54:45,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 109 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:54:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-04-06 11:54:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2022-04-06 11:54:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 161 states have internal predecessors, (187), 81 states have call successors, (81), 17 states have call predecessors, (81), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-06 11:54:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2022-04-06 11:54:45,590 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 77 [2022-04-06 11:54:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:54:45,590 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2022-04-06 11:54:45,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 11:54:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2022-04-06 11:54:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 11:54:45,591 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:54:45,591 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 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] [2022-04-06 11:54:45,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:54:45,807 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 [2022-04-06 11:54:45,807 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:54:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:54:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-04-06 11:54:45,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:54:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411243108] [2022-04-06 11:54:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:54:45,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:54:45,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:54:45,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570168190] [2022-04-06 11:54:45,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:54:45,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:54:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:54:45,816 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) [2022-04-06 11:54:45,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 11:54:45,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:54:45,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:54:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 11:54:45,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:54:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 11:54:46,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:54:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 11:54:47,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:54:47,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411243108] [2022-04-06 11:54:47,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:54:47,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570168190] [2022-04-06 11:54:47,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570168190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:54:47,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:54:47,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-04-06 11:54:47,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519748343] [2022-04-06 11:54:47,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:54:47,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 11:54:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:54:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 11:54:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-04-06 11:54:47,681 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:55:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:55:12,091 INFO L93 Difference]: Finished difference Result 424 states and 583 transitions. [2022-04-06 11:55:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 11:55:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-04-06 11:55:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:55:12,094 INFO L225 Difference]: With dead ends: 424 [2022-04-06 11:55:12,094 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 11:55:12,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=692, Invalid=2387, Unknown=1, NotChecked=0, Total=3080 [2022-04-06 11:55:12,095 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 256 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:55:12,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 499 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-04-06 11:55:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 11:55:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2022-04-06 11:55:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 218 states have (on average 1.1926605504587156) internal successors, (260), 219 states have internal predecessors, (260), 119 states have call successors, (119), 22 states have call predecessors, (119), 21 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-04-06 11:55:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2022-04-06 11:55:12,188 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 496 transitions. Word has length 77 [2022-04-06 11:55:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:55:12,188 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 496 transitions. [2022-04-06 11:55:12,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 11:55:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 496 transitions. [2022-04-06 11:55:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 11:55:12,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:55:12,190 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2022-04-06 11:55:12,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 11:55:12,403 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 [2022-04-06 11:55:12,403 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:55:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:55:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-04-06 11:55:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:55:12,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706461857] [2022-04-06 11:55:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:55:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:55:12,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:55:12,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563107157] [2022-04-06 11:55:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:55:12,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:55:12,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:55:12,411 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) [2022-04-06 11:55:12,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 11:55:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:55:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 11:55:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:55:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 11:55:13,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:55:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 11:55:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:55:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706461857] [2022-04-06 11:55:19,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:55:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563107157] [2022-04-06 11:55:19,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563107157] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:55:19,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:55:19,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 11:55:19,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697474125] [2022-04-06 11:55:19,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:55:19,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 11:55:19,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:55:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 11:55:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-04-06 11:55:19,326 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. Second operand has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 11:55:30,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:55:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:55:31,576 INFO L93 Difference]: Finished difference Result 468 states and 639 transitions. [2022-04-06 11:55:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 11:55:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 91 [2022-04-06 11:55:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:55:31,579 INFO L225 Difference]: With dead ends: 468 [2022-04-06 11:55:31,579 INFO L226 Difference]: Without dead ends: 464 [2022-04-06 11:55:31,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 11:55:31,580 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 341 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-06 11:55:31,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 398 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1382 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-04-06 11:55:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-04-06 11:55:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 370. [2022-04-06 11:55:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.192488262910798) internal successors, (254), 213 states have internal predecessors, (254), 130 states have call successors, (130), 27 states have call predecessors, (130), 26 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-06 11:55:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2022-04-06 11:55:31,679 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 91 [2022-04-06 11:55:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:55:31,679 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2022-04-06 11:55:31,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 11:55:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2022-04-06 11:55:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 11:55:31,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:55:31,682 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:55:31,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 11:55:31,893 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 [2022-04-06 11:55:31,894 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:55:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:55:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-04-06 11:55:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:55:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8900159] [2022-04-06 11:55:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:55:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:55:31,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:55:31,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361838319] [2022-04-06 11:55:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:55:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:55:31,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:55:31,906 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) [2022-04-06 11:55:31,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 11:55:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:55:31,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 11:55:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:55:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 11:55:32,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:55:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 11:55:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:55:32,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8900159] [2022-04-06 11:55:32,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:55:32,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361838319] [2022-04-06 11:55:32,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361838319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:55:32,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:55:32,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 11:55:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640098457] [2022-04-06 11:55:32,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:55:32,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:55:32,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:55:32,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:55:32,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:55:32,767 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 11:55:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:55:34,620 INFO L93 Difference]: Finished difference Result 897 states and 1392 transitions. [2022-04-06 11:55:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 11:55:34,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-04-06 11:55:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:55:34,624 INFO L225 Difference]: With dead ends: 897 [2022-04-06 11:55:34,624 INFO L226 Difference]: Without dead ends: 895 [2022-04-06 11:55:34,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-04-06 11:55:34,624 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 88 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 11:55:34,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 425 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 11:55:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-04-06 11:55:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 823. [2022-04-06 11:55:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 395 states have internal predecessors, (516), 398 states have call successors, (398), 30 states have call predecessors, (398), 29 states have return successors, (397), 397 states have call predecessors, (397), 397 states have call successors, (397) [2022-04-06 11:55:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1311 transitions. [2022-04-06 11:55:34,909 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1311 transitions. Word has length 94 [2022-04-06 11:55:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:55:34,910 INFO L478 AbstractCegarLoop]: Abstraction has 823 states and 1311 transitions. [2022-04-06 11:55:34,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 11:55:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1311 transitions. [2022-04-06 11:55:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 11:55:34,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:55:34,915 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 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, 1, 1, 1, 1] [2022-04-06 11:55:34,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 11:55:35,123 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 [2022-04-06 11:55:35,123 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:55:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:55:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-04-06 11:55:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:55:35,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395822034] [2022-04-06 11:55:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:55:35,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:55:35,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:55:35,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867996993] [2022-04-06 11:55:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:55:35,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:55:35,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:55:35,132 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) [2022-04-06 11:55:35,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 11:55:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:55:35,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 11:55:35,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:55:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 11:55:35,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:55:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 11:55:36,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:55:36,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395822034] [2022-04-06 11:55:36,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:55:36,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867996993] [2022-04-06 11:55:36,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867996993] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:55:36,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:55:36,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 11:55:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646492304] [2022-04-06 11:55:36,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:55:36,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 11:55:36,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:55:36,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 11:55:36,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-06 11:55:36,379 INFO L87 Difference]: Start difference. First operand 823 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 11:55:42,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:55:46,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:55:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:55:48,906 INFO L93 Difference]: Finished difference Result 929 states and 1490 transitions. [2022-04-06 11:55:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 11:55:48,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-04-06 11:55:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:55:48,907 INFO L225 Difference]: With dead ends: 929 [2022-04-06 11:55:48,907 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 11:55:48,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 11:55:48,909 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 86 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:55:48,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 315 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-04-06 11:55:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 11:55:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 11:55:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 11:55:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 11:55:48,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-04-06 11:55:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:55:48,911 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 11:55:48,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 11:55:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 11:55:48,911 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 11:55:48,913 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:55:48,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 11:55:49,119 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 [2022-04-06 11:55:49,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 11:55:54,830 WARN L232 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 464 DAG size of output: 472 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:56:00,219 WARN L232 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 468 DAG size of output: 468 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:56:11,381 WARN L232 SmtUtils]: Spent 11.16s on a formula simplification. DAG size of input: 409 DAG size of output: 404 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:56:16,697 WARN L232 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 469 DAG size of output: 471 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:56:23,965 WARN L232 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 485 DAG size of output: 476 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:56:31,229 WARN L232 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 485 DAG size of output: 476 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 11:57:17,516 WARN L232 SmtUtils]: Spent 42.43s on a formula simplification. DAG size of input: 392 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:58:19,515 WARN L232 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 388 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:58:41,561 WARN L232 SmtUtils]: Spent 22.04s on a formula simplification. DAG size of input: 333 DAG size of output: 58 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 11:59:27,539 WARN L232 SmtUtils]: Spent 45.97s on a formula simplification. DAG size of input: 391 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 12:00:17,699 WARN L232 SmtUtils]: Spent 50.16s on a formula simplification. DAG size of input: 401 DAG size of output: 60 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 12:00:59,525 WARN L232 SmtUtils]: Spent 41.82s on a formula simplification. DAG size of input: 401 DAG size of output: 59 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 12:00:59,528 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 12:00:59,529 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-04-06 12:00:59,529 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-04-06 12:00:59,529 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-04-06 12:00:59,529 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 50)) [2022-04-06 12:00:59,529 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 50)) [2022-04-06 12:00:59,529 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse1 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 .cse1)) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (or (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (not (<= (* main_~b~0 3) main_~c~0)) (<= (* main_~b~0 4) main_~c~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 (or (= .cse1 (+ (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0))) (<= main_~b~0 main_~c~0)) .cse2 .cse3) (and (= main_~s~0 1) .cse0 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-06 12:00:59,530 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (* main_~q~0 main_~x~0)) (.cse1 (* main_~y~0 main_~s~0))) (let ((.cse2 (= main_~b~0 (+ .cse0 .cse1)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (= (+ .cse0 main_~a~0 .cse1) (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (or .cse2 (= main_~b~0 0)) (or .cse2 (<= main_~b~0 main_~c~0)) (<= 1 main_~y~0) (<= main_~y~0 50)))) [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse14 (* main_~y~0 main_~r~0)) (.cse15 (* main_~p~0 main_~x~0))) (let ((.cse11 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse12 (<= 1 main_~x~0)) (.cse0 (= main_~k~0 0)) (.cse10 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ .cse14 .cse15))) (.cse13 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse14 main_~v~0 .cse15))) (.cse3 (<= 1 main_~a~0)) (.cse4 (= main_~b~0 main_~y~0)) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~y~0 50)) (.cse9 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (= main_~c~0 main_~x~0) .cse8 .cse9) (and (< main_~b~0 main_~a~0) .cse10 .cse11 .cse12 .cse2 .cse13 .cse6 .cse8) (and (= main_~c~0 main_~a~0) .cse11 .cse12 .cse0 .cse2 (< main_~b~0 main_~c~0) .cse6 .cse8) (and .cse10 .cse1 .cse2 .cse13 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9)))) [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse6 (= main_~a~0 (+ .cse4 .cse5))) (.cse2 (* main_~k~0 main_~y~0 main_~s~0)) (.cse3 (* main_~q~0 main_~k~0 main_~x~0)) (.cse7 (<= 1 main_~y~0)) (.cse8 (<= main_~y~0 50))) (or (let ((.cse1 (* main_~q~0 main_~x~0)) (.cse0 (* main_~y~0 main_~s~0))) (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= (+ (* 2 .cse0) (* .cse1 2) .cse2 main_~c~0 .cse3) (+ .cse4 .cse5 (* main_~b~0 2))) (= main_~b~0 (+ .cse1 .cse0)) (<= 1 main_~x~0) .cse6 .cse7 .cse8)) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse6 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse2 main_~c~0 .cse3 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5)) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse7 (= main_~a~0 main_~x~0) .cse8 (= main_~p~0 1))))) [2022-04-06 12:00:59,530 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-04-06 12:00:59,530 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse6 (= main_~a~0 (+ .cse4 .cse5))) (.cse2 (* main_~k~0 main_~y~0 main_~s~0)) (.cse3 (* main_~q~0 main_~k~0 main_~x~0)) (.cse7 (<= 1 main_~y~0)) (.cse8 (<= main_~y~0 50))) (or (let ((.cse1 (* main_~q~0 main_~x~0)) (.cse0 (* main_~y~0 main_~s~0))) (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= (+ (* 2 .cse0) (* .cse1 2) .cse2 main_~c~0 .cse3) (+ .cse4 .cse5 (* main_~b~0 2))) (= main_~b~0 (+ .cse1 .cse0)) (<= 1 main_~x~0) .cse6 .cse7 .cse8)) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse6 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse2 main_~c~0 .cse3 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5)) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse7 (= main_~a~0 main_~x~0) .cse8 (= main_~p~0 1))))) [2022-04-06 12:00:59,530 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-06 12:00:59,531 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-06 12:00:59,531 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-06 12:00:59,531 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-04-06 12:00:59,531 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-04-06 12:00:59,531 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-04-06 12:00:59,531 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-04-06 12:00:59,531 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-04-06 12:00:59,531 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-04-06 12:00:59,531 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-04-06 12:00:59,533 INFO L719 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:00:59,534 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 12:00:59,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 12:00:59 BasicIcfg [2022-04-06 12:00:59,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 12:00:59,547 INFO L158 Benchmark]: Toolchain (without parser) took 388677.18ms. Allocated memory was 196.1MB in the beginning and 407.9MB in the end (delta: 211.8MB). Free memory was 145.2MB in the beginning and 285.4MB in the end (delta: -140.2MB). Peak memory consumption was 225.2MB. Max. memory is 8.0GB. [2022-04-06 12:00:59,547 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 196.1MB. Free memory is still 161.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 12:00:59,547 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.27ms. Allocated memory is still 196.1MB. Free memory was 145.0MB in the beginning and 171.1MB in the end (delta: -26.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 12:00:59,547 INFO L158 Benchmark]: Boogie Preprocessor took 24.82ms. Allocated memory is still 196.1MB. Free memory was 171.1MB in the beginning and 169.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 12:00:59,548 INFO L158 Benchmark]: RCFGBuilder took 294.83ms. Allocated memory is still 196.1MB. Free memory was 169.5MB in the beginning and 158.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 12:00:59,548 INFO L158 Benchmark]: IcfgTransformer took 17.63ms. Allocated memory is still 196.1MB. Free memory was 158.0MB in the beginning and 156.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 12:00:59,548 INFO L158 Benchmark]: TraceAbstraction took 388141.71ms. Allocated memory was 196.1MB in the beginning and 407.9MB in the end (delta: 211.8MB). Free memory was 155.9MB in the beginning and 285.4MB in the end (delta: -129.5MB). Peak memory consumption was 237.5MB. Max. memory is 8.0GB. [2022-04-06 12:00:59,549 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 196.1MB. Free memory is still 161.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.27ms. Allocated memory is still 196.1MB. Free memory was 145.0MB in the beginning and 171.1MB in the end (delta: -26.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.82ms. Allocated memory is still 196.1MB. Free memory was 171.1MB in the beginning and 169.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 294.83ms. Allocated memory is still 196.1MB. Free memory was 169.5MB in the beginning and 158.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.63ms. Allocated memory is still 196.1MB. Free memory was 158.0MB in the beginning and 156.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 388141.71ms. Allocated memory was 196.1MB in the beginning and 407.9MB in the end (delta: 211.8MB). Free memory was 155.9MB in the beginning and 285.4MB in the end (delta: -129.5MB). Peak memory consumption was 237.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 388.1s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 57.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 310.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1260 SdHoareTripleChecker+Valid, 29.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1196 mSDsluCounter, 4252 SdHoareTripleChecker+Invalid, 29.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 84 IncrementalHoareTripleChecker+Unchecked, 3333 mSDsCounter, 1731 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6460 IncrementalHoareTripleChecker+Invalid, 8276 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1731 mSolverCounterUnsat, 919 mSDtfsCounter, 6460 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1970 GetRequests, 1626 SyntacticMatches, 16 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 29.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=823occurred in iteration=17, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 498 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 565 PreInvPairs, 1178 NumberOfFragments, 1068 HoareAnnotationTreeSize, 565 FomulaSimplifications, 410418 FormulaSimplificationTreeSizeReduction, 42.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 765988 FormulaSimplificationTreeSizeReductionInter, 268.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1806 ConstructedInterpolants, 3 QuantifiedInterpolants, 9373 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2865 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2231/2489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((b < a && v == d * b) && 2 * (y * s) + q * x * 2 + k * y * s + c + q * k * x == y * r + p * x + b * 2) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && 1 <= y) && y <= 50) || ((((((((((a == c + b * k && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((b < a && ((a == c + b * k || !(b * 3 <= c)) || b * 4 <= c)) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && 1 <= y) && y <= 50) || ((((((((s == 1 && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((k == 0 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c == x) && y <= 50) && p == 1) || (((((((b < a && v == d * b) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= y) && y <= 50)) || (((((((c == a && b == q * x + y * s) && 1 <= x) && k == 0) && a == y * r + p * x) && b < c) && 1 <= y) && y <= 50)) || ((((((((((v == d * b && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-04-06 12:00:59,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...