/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/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 23:51:35,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 23:51:35,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 23:51:35,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 23:51:35,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 23:51:35,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 23:51:35,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 23:51:35,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 23:51:35,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 23:51:35,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 23:51:35,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 23:51:35,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 23:51:35,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 23:51:35,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 23:51:35,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 23:51:35,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 23:51:35,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 23:51:35,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 23:51:35,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 23:51:35,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 23:51:35,997 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 23:51:36,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 23:51:36,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 23:51:36,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 23:51:36,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 23:51:36,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 23:51:36,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 23:51:36,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 23:51:36,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 23:51:36,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 23:51:36,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 23:51:36,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 23:51:36,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 23:51:36,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 23:51:36,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 23:51:36,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 23:51:36,063 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 23:51:36,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 23:51:36,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 23:51:36,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 23:51:36,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 23:51:36,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 23:51:36,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 23:51:36,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:51:36,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 23:51:36,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 23:51:36,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 23:51:36,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 23:51:36,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 23:51:36,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 23:51:36,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 23:51:36,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 23:51:36,068 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 23:51:36,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 23:51:36,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 23:51:36,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 23:51:36,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 23:51:36,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 23:51:36,320 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 23:51:36,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-18 23:51:36,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd10e4e7/20ce2546831c495e99901c0f30ed2e2a/FLAG743f0ce85 [2022-03-18 23:51:36,766 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 23:51:36,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-18 23:51:36,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd10e4e7/20ce2546831c495e99901c0f30ed2e2a/FLAG743f0ce85 [2022-03-18 23:51:36,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd10e4e7/20ce2546831c495e99901c0f30ed2e2a [2022-03-18 23:51:36,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 23:51:36,786 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 23:51:36,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 23:51:36,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 23:51:36,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 23:51:36,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:51:36" (1/1) ... [2022-03-18 23:51:36,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d7c74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:36, skipping insertion in model container [2022-03-18 23:51:36,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:51:36" (1/1) ... [2022-03-18 23:51:36,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 23:51:36,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 23:51:36,942 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/egcd2-ll_valuebound100.c[490,503] [2022-03-18 23:51:36,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:51:36,977 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 23:51:36,993 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/egcd2-ll_valuebound100.c[490,503] [2022-03-18 23:51:37,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:51:37,024 INFO L208 MainTranslator]: Completed translation [2022-03-18 23:51:37,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37 WrapperNode [2022-03-18 23:51:37,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 23:51:37,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 23:51:37,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 23:51:37,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 23:51:37,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 23:51:37,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 23:51:37,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 23:51:37,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 23:51:37,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:51:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:37,085 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) [2022-03-18 23:51:37,091 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 [2022-03-18 23:51:37,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 23:51:37,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 23:51:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 23:51:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 23:51:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 23:51:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 23:51:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 23:51:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 23:51:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 23:51:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 23:51:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 23:51:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 23:51:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 23:51:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 23:51:37,173 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 23:51:37,174 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 23:51:37,301 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 23:51:37,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 23:51:37,307 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 23:51:37,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:51:37 BoogieIcfgContainer [2022-03-18 23:51:37,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 23:51:37,309 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 23:51:37,309 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 23:51:37,310 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 23:51:37,313 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:51:37" (1/1) ... [2022-03-18 23:51:37,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:51:37 BasicIcfg [2022-03-18 23:51:37,331 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 23:51:37,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 23:51:37,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 23:51:37,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 23:51:37,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:51:36" (1/4) ... [2022-03-18 23:51:37,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1108b2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:51:37, skipping insertion in model container [2022-03-18 23:51:37,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:51:37" (2/4) ... [2022-03-18 23:51:37,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1108b2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:51:37, skipping insertion in model container [2022-03-18 23:51:37,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:51:37" (3/4) ... [2022-03-18 23:51:37,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1108b2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:51:37, skipping insertion in model container [2022-03-18 23:51:37,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:51:37" (4/4) ... [2022-03-18 23:51:37,339 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.cqvasr [2022-03-18 23:51:37,344 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 23:51:37,344 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 23:51:37,383 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 23:51:37,393 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 [2022-03-18 23:51:37,394 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 23:51:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 23:51:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 23:51:37,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:37,435 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 23:51:37,435 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-03-18 23:51:37,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:37,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511302401] [2022-03-18 23:51:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:37,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:51:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:51:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 23:51:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 23:51:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 23:51:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 23:51:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 23:51:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 23:51:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511302401] [2022-03-18 23:51:37,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511302401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:51:37,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:51:37,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 23:51:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005454306] [2022-03-18 23:51:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:51:37,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 23:51:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 23:51:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:51:37,744 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:51:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:37,846 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-18 23:51:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 23:51:37,849 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-18 23:51:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:37,862 INFO L225 Difference]: With dead ends: 73 [2022-03-18 23:51:37,862 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 23:51:37,865 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:51:37,868 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:37,870 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:51:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 23:51:37,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 23:51:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 23:51:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-18 23:51:37,910 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-18 23:51:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:37,911 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-18 23:51:37,911 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:51:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-18 23:51:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 23:51:37,913 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:37,913 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 23:51:37,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 23:51:37,914 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-03-18 23:51:37,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:37,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083735000] [2022-03-18 23:51:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:37,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:37,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555937082] [2022-03-18 23:51:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:37,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:37,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:37,939 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) [2022-03-18 23:51:37,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 23:51:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:51:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 23:51:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 23:51:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:38,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083735000] [2022-03-18 23:51:38,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555937082] [2022-03-18 23:51:38,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555937082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:51:38,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:51:38,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 23:51:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34557902] [2022-03-18 23:51:38,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:38,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 23:51:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 23:51:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:51:38,452 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:51:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:38,562 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-18 23:51:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:51:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-18 23:51:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:38,564 INFO L225 Difference]: With dead ends: 52 [2022-03-18 23:51:38,564 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 23:51:38,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:51:38,566 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:38,566 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:51:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 23:51:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 23:51:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 23:51:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 23:51:38,577 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-18 23:51:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:38,577 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 23:51:38,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:51:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 23:51:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 23:51:38,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:38,579 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 23:51:38,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:38,799 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 [2022-03-18 23:51:38,800 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-03-18 23:51:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:38,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915781562] [2022-03-18 23:51:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:38,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:38,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237166957] [2022-03-18 23:51:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:38,845 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) [2022-03-18 23:51:38,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 23:51:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 23:51:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 23:51:39,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 23:51:39,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915781562] [2022-03-18 23:51:39,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237166957] [2022-03-18 23:51:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237166957] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:51:39,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:51:39,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 23:51:39,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928137698] [2022-03-18 23:51:39,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:51:39,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:51:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:51:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:51:39,211 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 23:51:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:39,255 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-18 23:51:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:51:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-18 23:51:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:39,258 INFO L225 Difference]: With dead ends: 43 [2022-03-18 23:51:39,258 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 23:51:39,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:51:39,262 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:39,264 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:51:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 23:51:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 23:51:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 23:51:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-18 23:51:39,287 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-18 23:51:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:39,288 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-18 23:51:39,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 23:51:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-18 23:51:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 23:51:39,289 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:39,289 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 23:51:39,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:39,490 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 [2022-03-18 23:51:39,490 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-03-18 23:51:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:39,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011467076] [2022-03-18 23:51:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:39,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:39,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430942733] [2022-03-18 23:51:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:39,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:39,515 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) [2022-03-18 23:51:39,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 23:51:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 23:51:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 23:51:39,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:39,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011467076] [2022-03-18 23:51:39,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:39,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430942733] [2022-03-18 23:51:39,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430942733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:51:39,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:51:39,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 23:51:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621462265] [2022-03-18 23:51:39,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:39,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:51:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:51:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:51:39,915 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 23:51:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:40,084 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-03-18 23:51:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 23:51:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-18 23:51:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:40,087 INFO L225 Difference]: With dead ends: 54 [2022-03-18 23:51:40,088 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 23:51:40,088 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:51:40,089 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:40,089 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:51:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 23:51:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-18 23:51:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 23:51:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-18 23:51:40,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-18 23:51:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:40,098 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-18 23:51:40,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 23:51:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-18 23:51:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 23:51:40,100 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:40,100 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-03-18 23:51:40,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:40,307 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 [2022-03-18 23:51:40,307 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-03-18 23:51:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:40,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774219644] [2022-03-18 23:51:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:40,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:40,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088551170] [2022-03-18 23:51:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:40,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:40,322 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) [2022-03-18 23:51:40,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 23:51:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 23:51:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 23:51:40,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 23:51:40,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774219644] [2022-03-18 23:51:40,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088551170] [2022-03-18 23:51:40,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088551170] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:51:40,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:51:40,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 23:51:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19001291] [2022-03-18 23:51:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:51:40,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:51:40,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:51:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:51:40,786 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-03-18 23:51:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:40,838 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-03-18 23:51:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:51:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 55 [2022-03-18 23:51:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:40,841 INFO L225 Difference]: With dead ends: 58 [2022-03-18 23:51:40,841 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 23:51:40,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:51:40,842 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:40,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:51:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 23:51:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 23:51:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 23:51:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-18 23:51:40,858 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-18 23:51:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:40,860 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-18 23:51:40,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-03-18 23:51:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-18 23:51:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 23:51:40,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:40,864 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-03-18 23:51:40,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:41,079 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 [2022-03-18 23:51:41,080 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-03-18 23:51:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:41,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913519199] [2022-03-18 23:51:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:41,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:41,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296430879] [2022-03-18 23:51:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:41,102 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) [2022-03-18 23:51:41,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 23:51:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 23:51:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 23:51:41,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:41,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:41,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913519199] [2022-03-18 23:51:41,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:41,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296430879] [2022-03-18 23:51:41,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296430879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:51:41,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:51:41,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 23:51:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212129517] [2022-03-18 23:51:41,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:41,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 23:51:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 23:51:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:51:41,477 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 23:51:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:41,578 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-18 23:51:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 23:51:41,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-18 23:51:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:41,583 INFO L225 Difference]: With dead ends: 62 [2022-03-18 23:51:41,584 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 23:51:41,584 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:51:41,588 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:41,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:51:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 23:51:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 23:51:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 23:51:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-18 23:51:41,609 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-18 23:51:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:41,610 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-18 23:51:41,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 23:51:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-18 23:51:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 23:51:41,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:41,614 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:51:41,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:41,834 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 [2022-03-18 23:51:41,835 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-03-18 23:51:41,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:41,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783677495] [2022-03-18 23:51:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:41,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489308147] [2022-03-18 23:51:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:41,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:41,865 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) [2022-03-18 23:51:41,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 23:51:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:41,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:51:41,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 23:51:42,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 23:51:42,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783677495] [2022-03-18 23:51:42,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489308147] [2022-03-18 23:51:42,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489308147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:51:42,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:51:42,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 23:51:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623952817] [2022-03-18 23:51:42,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:42,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 23:51:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 23:51:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:51:42,187 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 23:51:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:42,336 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-18 23:51:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 23:51:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-18 23:51:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:42,339 INFO L225 Difference]: With dead ends: 106 [2022-03-18 23:51:42,339 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 23:51:42,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:51:42,340 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:42,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:51:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 23:51:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-18 23:51:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 23:51:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-18 23:51:42,368 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-18 23:51:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:42,368 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-18 23:51:42,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 23:51:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-18 23:51:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 23:51:42,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:42,370 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:51:42,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 23:51:42,583 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 [2022-03-18 23:51:42,583 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-03-18 23:51:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:42,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940174011] [2022-03-18 23:51:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:42,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:42,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392814615] [2022-03-18 23:51:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:42,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:42,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:42,598 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) [2022-03-18 23:51:42,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 23:51:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 23:51:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 23:51:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 23:51:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940174011] [2022-03-18 23:51:42,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392814615] [2022-03-18 23:51:42,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392814615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:51:42,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:51:42,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 23:51:42,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779454658] [2022-03-18 23:51:42,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:42,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 23:51:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:42,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 23:51:42,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-18 23:51:42,992 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 23:51:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:43,256 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-03-18 23:51:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 23:51:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-18 23:51:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:43,260 INFO L225 Difference]: With dead ends: 132 [2022-03-18 23:51:43,260 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 23:51:43,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-18 23:51:43,261 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:43,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 397 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 23:51:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 23:51:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-18 23:51:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 23:51:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-18 23:51:43,278 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-18 23:51:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:43,279 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-18 23:51:43,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 23:51:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-18 23:51:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 23:51:43,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:43,280 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1] [2022-03-18 23:51:43,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 23:51:43,493 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 [2022-03-18 23:51:43,494 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-03-18 23:51:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:43,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661566055] [2022-03-18 23:51:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:43,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:43,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:43,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268303493] [2022-03-18 23:51:43,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:51:43,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:43,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:43,506 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) [2022-03-18 23:51:43,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 23:51:43,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:51:43,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:51:43,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 23:51:43,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 23:51:44,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-18 23:51:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:44,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661566055] [2022-03-18 23:51:44,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268303493] [2022-03-18 23:51:44,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268303493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:51:44,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:51:44,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 23:51:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061501853] [2022-03-18 23:51:44,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:44,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 23:51:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 23:51:44,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-18 23:51:44,259 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 23:51:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:45,696 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-03-18 23:51:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 23:51:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-18 23:51:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:45,698 INFO L225 Difference]: With dead ends: 128 [2022-03-18 23:51:45,698 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 23:51:45,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-18 23:51:45,711 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:45,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 305 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 23:51:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 23:51:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-18 23:51:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 23:51:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-18 23:51:45,738 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-18 23:51:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:45,740 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-18 23:51:45,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 23:51:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-18 23:51:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 23:51:45,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:45,741 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2022-03-18 23:51:45,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:45,969 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 [2022-03-18 23:51:45,969 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-03-18 23:51:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:45,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809410139] [2022-03-18 23:51:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:45,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:45,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009568530] [2022-03-18 23:51:45,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:51:45,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:45,989 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) [2022-03-18 23:51:45,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 23:51:46,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 23:51:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:51:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 23:51:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-18 23:51:46,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:46,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809410139] [2022-03-18 23:51:46,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009568530] [2022-03-18 23:51:46,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009568530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:51:46,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:51:46,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 23:51:46,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833983196] [2022-03-18 23:51:46,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:46,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 23:51:46,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:46,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 23:51:46,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:51:46,608 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-18 23:51:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:46,813 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2022-03-18 23:51:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 23:51:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-18 23:51:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:46,815 INFO L225 Difference]: With dead ends: 144 [2022-03-18 23:51:46,815 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 23:51:46,816 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:51:46,816 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:46,816 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:51:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 23:51:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-18 23:51:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 23:51:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-18 23:51:46,839 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-18 23:51:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:46,840 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-18 23:51:46,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-18 23:51:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-18 23:51:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 23:51:46,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:46,841 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2022-03-18 23:51:46,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:47,063 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 [2022-03-18 23:51:47,063 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-03-18 23:51:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:47,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063595282] [2022-03-18 23:51:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:47,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:47,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851265991] [2022-03-18 23:51:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:47,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:47,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:47,084 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) [2022-03-18 23:51:47,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 23:51:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 23:51:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 23:51:47,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 23:51:48,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063595282] [2022-03-18 23:51:48,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851265991] [2022-03-18 23:51:48,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851265991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:51:48,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:51:48,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 23:51:48,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180346547] [2022-03-18 23:51:48,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:48,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 23:51:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 23:51:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:51:48,058 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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) [2022-03-18 23:51:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:50,295 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-03-18 23:51:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 23:51:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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 91 [2022-03-18 23:51:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:50,297 INFO L225 Difference]: With dead ends: 228 [2022-03-18 23:51:50,297 INFO L226 Difference]: Without dead ends: 220 [2022-03-18 23:51:50,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-18 23:51:50,298 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:50,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 440 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 23:51:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-18 23:51:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-18 23:51:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 23:51:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-18 23:51:50,348 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-18 23:51:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:50,349 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-18 23:51:50,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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) [2022-03-18 23:51:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-18 23:51:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 23:51:50,350 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:50,350 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:51:50,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:50,563 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 [2022-03-18 23:51:50,563 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-03-18 23:51:50,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:50,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657651874] [2022-03-18 23:51:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:50,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381632564] [2022-03-18 23:51:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:50,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:50,583 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) [2022-03-18 23:51:50,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 23:51:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:51:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 23:51:50,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-18 23:51:51,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:51:51,555 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:51:56,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:56,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657651874] [2022-03-18 23:51:56,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:56,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381632564] [2022-03-18 23:51:56,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381632564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:51:56,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:51:56,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 23:51:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921830230] [2022-03-18 23:51:56,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:51:56,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 23:51:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 23:51:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-03-18 23:51:56,502 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:51:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:57,005 INFO L93 Difference]: Finished difference Result 226 states and 306 transitions. [2022-03-18 23:51:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 23:51:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 107 [2022-03-18 23:51:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:57,008 INFO L225 Difference]: With dead ends: 226 [2022-03-18 23:51:57,008 INFO L226 Difference]: Without dead ends: 224 [2022-03-18 23:51:57,009 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-03-18 23:51:57,010 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 24 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:57,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 362 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 23:51:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-18 23:51:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-03-18 23:51:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 23:51:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2022-03-18 23:51:57,097 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 107 [2022-03-18 23:51:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:57,097 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2022-03-18 23:51:57,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:51:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2022-03-18 23:51:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 23:51:57,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:57,098 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:51:57,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:57,327 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 [2022-03-18 23:51:57,328 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-03-18 23:51:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:57,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991219086] [2022-03-18 23:51:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:57,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:57,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70990549] [2022-03-18 23:51:57,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 23:51:57,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:57,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:57,346 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) [2022-03-18 23:51:57,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 23:51:57,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 23:51:57,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:51:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 23:51:57,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 23:51:57,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:51:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:51:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991219086] [2022-03-18 23:51:57,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:51:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70990549] [2022-03-18 23:51:57,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70990549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:51:57,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:51:57,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:51:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058905322] [2022-03-18 23:51:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:51:57,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:51:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:51:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:51:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:51:57,548 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-18 23:51:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:51:57,634 INFO L93 Difference]: Finished difference Result 281 states and 378 transitions. [2022-03-18 23:51:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:51:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-03-18 23:51:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:51:57,635 INFO L225 Difference]: With dead ends: 281 [2022-03-18 23:51:57,636 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 23:51:57,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:51:57,637 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:51:57,637 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:51:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 23:51:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-03-18 23:51:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 23:51:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-18 23:51:57,668 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 110 [2022-03-18 23:51:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:51:57,668 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-18 23:51:57,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-18 23:51:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-18 23:51:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 23:51:57,670 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:51:57,670 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:51:57,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 23:51:57,893 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 [2022-03-18 23:51:57,894 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:51:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:51:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 2 times [2022-03-18 23:51:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:51:57,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021037222] [2022-03-18 23:51:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:51:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:51:57,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:51:57,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001977642] [2022-03-18 23:51:57,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:51:57,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:51:57,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:51:57,915 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) [2022-03-18 23:51:57,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 23:51:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:51:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:51:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 23:51:57,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:51:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-18 23:51:59,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:52:01,464 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:52:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:52:02,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021037222] [2022-03-18 23:52:02,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:52:02,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001977642] [2022-03-18 23:52:02,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001977642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:52:02,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:52:02,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 23:52:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981427626] [2022-03-18 23:52:02,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:52:02,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 23:52:02,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:52:02,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 23:52:02,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-18 23:52:02,090 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 23:52:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:52:04,260 INFO L93 Difference]: Finished difference Result 194 states and 250 transitions. [2022-03-18 23:52:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 23:52:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-18 23:52:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:52:04,262 INFO L225 Difference]: With dead ends: 194 [2022-03-18 23:52:04,262 INFO L226 Difference]: Without dead ends: 192 [2022-03-18 23:52:04,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-03-18 23:52:04,263 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 23:52:04,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 292 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 23:52:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-18 23:52:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2022-03-18 23:52:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 23:52:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-18 23:52:04,316 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 129 [2022-03-18 23:52:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:52:04,319 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-18 23:52:04,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 23:52:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-18 23:52:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 23:52:04,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:52:04,321 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 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, 1] [2022-03-18 23:52:04,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 23:52:04,543 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 [2022-03-18 23:52:04,543 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:52:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:52:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 3 times [2022-03-18 23:52:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:52:04,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294993937] [2022-03-18 23:52:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:52:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:52:04,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:52:04,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138068753] [2022-03-18 23:52:04,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:52:04,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:52:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:52:04,560 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) [2022-03-18 23:52:04,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 23:52:04,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 23:52:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:52:04,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 23:52:04,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:52:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-03-18 23:52:05,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:52:09,678 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~s~0 c_main_~k~0)) (.cse3 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse5 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse3))) (.cse7 (+ c_main_~s~0 .cse2 (* (- 1) c_main_~r~0)))) (let ((.cse4 (* .cse7 c_main_~y~0)) (.cse6 (* .cse5 c_main_~x~0))) (let ((.cse8 (+ .cse4 .cse6))) (or (not (let ((.cse1 (+ c_main_~p~0 .cse3)) (.cse0 (+ c_main_~r~0 (* (- 1) .cse2)))) (= (+ (* .cse0 c_main_~y~0) (* .cse1 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse1) c_main_~c~0 (* c_main_~yy~0 .cse0))))) (= (+ .cse4 (* .cse5 c_main_~xy~0) .cse6 (* c_main_~yy~0 .cse7)) (+ (* .cse8 c_main_~y~0) .cse4 .cse6)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse8))))))) is different from true [2022-03-18 23:52:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 30 refuted. 0 times theorem prover too weak. 402 trivial. 18 not checked. [2022-03-18 23:52:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:52:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294993937] [2022-03-18 23:52:13,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:52:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138068753] [2022-03-18 23:52:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138068753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:52:13,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:52:13,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 23:52:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110640945] [2022-03-18 23:52:13,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:52:13,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 23:52:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:52:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 23:52:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=325, Unknown=1, NotChecked=38, Total=462 [2022-03-18 23:52:13,466 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-18 23:52:47,959 WARN L232 SmtUtils]: Spent 27.21s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:52:50,099 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 [] [2022-03-18 23:52:52,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:52:55,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:00,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:03,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:05,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:09,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:11,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:14,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:16,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:19,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:21,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:23,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:26,075 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 [] [2022-03-18 23:53:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:53:26,097 INFO L93 Difference]: Finished difference Result 245 states and 319 transitions. [2022-03-18 23:53:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 23:53:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 132 [2022-03-18 23:53:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:53:26,103 INFO L225 Difference]: With dead ends: 245 [2022-03-18 23:53:26,103 INFO L226 Difference]: Without dead ends: 243 [2022-03-18 23:53:26,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 240 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=310, Invalid=882, Unknown=2, NotChecked=66, Total=1260 [2022-03-18 23:53:26,106 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 95 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 202 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time [2022-03-18 23:53:26,106 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 464 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 682 Invalid, 13 Unknown, 117 Unchecked, 33.6s Time] [2022-03-18 23:53:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-18 23:53:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2022-03-18 23:53:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.125984251968504) internal successors, (143), 129 states have internal predecessors, (143), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 23:53:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 303 transitions. [2022-03-18 23:53:26,168 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 303 transitions. Word has length 132 [2022-03-18 23:53:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:53:26,168 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 303 transitions. [2022-03-18 23:53:26,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-18 23:53:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 303 transitions. [2022-03-18 23:53:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 23:53:26,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:53:26,170 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-18 23:53:26,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 23:53:26,383 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 [2022-03-18 23:53:26,383 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:53:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:53:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-03-18 23:53:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:53:26,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836540418] [2022-03-18 23:53:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:53:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:53:26,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:53:26,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422328068] [2022-03-18 23:53:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:53:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:53:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:53:26,393 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) [2022-03-18 23:53:26,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 23:53:26,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:53:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:53:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 23:53:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:53:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 23:53:28,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:53:28,944 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:53:28,945 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:53:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 23:53:42,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:53:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836540418] [2022-03-18 23:53:42,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:53:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422328068] [2022-03-18 23:53:42,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422328068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:53:42,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:53:42,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-18 23:53:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302322931] [2022-03-18 23:53:42,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:53:42,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 23:53:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:53:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 23:53:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=674, Unknown=3, NotChecked=0, Total=812 [2022-03-18 23:53:42,754 INFO L87 Difference]: Start difference. First operand 232 states and 303 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-18 23:53:53,668 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 [] [2022-03-18 23:53:55,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:53:57,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:00,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:02,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:08,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:13,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:15,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:17,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:54:35,539 WARN L232 SmtUtils]: Spent 14.29s on a formula simplification. DAG size of input: 118 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:54:48,439 WARN L232 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:54:50,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:12,872 WARN L232 SmtUtils]: Spent 14.87s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:55:15,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:17,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:46,736 WARN L232 SmtUtils]: Spent 26.92s on a formula simplification. DAG size of input: 122 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:55:49,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:24,165 WARN L232 SmtUtils]: Spent 32.08s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:56:27,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:37,498 WARN L232 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 94 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:56:40,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:56,156 WARN L232 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:57:08,751 WARN L232 SmtUtils]: Spent 9.28s on a formula simplification. DAG size of input: 99 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:57:15,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:18,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:20,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:57:22,901 INFO L93 Difference]: Finished difference Result 349 states and 478 transitions. [2022-03-18 23:57:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 23:57:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-03-18 23:57:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:57:22,904 INFO L225 Difference]: With dead ends: 349 [2022-03-18 23:57:22,905 INFO L226 Difference]: Without dead ends: 341 [2022-03-18 23:57:22,906 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 181.0s TimeCoverageRelationStatistics Valid=917, Invalid=3627, Unknown=12, NotChecked=0, Total=4556 [2022-03-18 23:57:22,906 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 168 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 396 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.6s IncrementalHoareTripleChecker+Time [2022-03-18 23:57:22,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 688 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1072 Invalid, 16 Unknown, 0 Unchecked, 52.6s Time] [2022-03-18 23:57:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-18 23:57:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 301. [2022-03-18 23:57:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 161 states have (on average 1.1366459627329193) internal successors, (183), 163 states have internal predecessors, (183), 113 states have call successors, (113), 27 states have call predecessors, (113), 26 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-18 23:57:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 407 transitions. [2022-03-18 23:57:23,032 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 407 transitions. Word has length 138 [2022-03-18 23:57:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:57:23,032 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 407 transitions. [2022-03-18 23:57:23,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-18 23:57:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 407 transitions. [2022-03-18 23:57:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 23:57:23,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:57:23,034 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-18 23:57:23,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 23:57:23,247 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 [2022-03-18 23:57:23,247 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:57:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:57:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash -739364489, now seen corresponding path program 4 times [2022-03-18 23:57:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:57:23,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531739346] [2022-03-18 23:57:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:57:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:57:23,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:57:23,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124361445] [2022-03-18 23:57:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 23:57:23,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:57:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:57:23,272 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) [2022-03-18 23:57:23,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 23:57:23,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 23:57:23,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:57:23,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 23:57:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:57:25,876 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:57:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 201 proven. 288 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-03-18 23:57:27,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:57:30,269 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:57:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:57:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531739346] [2022-03-18 23:57:34,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:57:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124361445] [2022-03-18 23:57:34,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124361445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:57:34,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:57:34,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-18 23:57:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376340989] [2022-03-18 23:57:34,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:57:34,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 23:57:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:57:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 23:57:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=649, Unknown=1, NotChecked=0, Total=812 [2022-03-18 23:57:34,063 INFO L87 Difference]: Start difference. First operand 301 states and 407 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-18 23:57:43,367 WARN L232 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:57:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:57:44,653 INFO L93 Difference]: Finished difference Result 388 states and 519 transitions. [2022-03-18 23:57:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 23:57:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 176 [2022-03-18 23:57:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:57:44,656 INFO L225 Difference]: With dead ends: 388 [2022-03-18 23:57:44,657 INFO L226 Difference]: Without dead ends: 386 [2022-03-18 23:57:44,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=206, Invalid=915, Unknown=1, NotChecked=0, Total=1122 [2022-03-18 23:57:44,658 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 45 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 23:57:44,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 497 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 23:57:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-03-18 23:57:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 381. [2022-03-18 23:57:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 207 states have internal predecessors, (232), 141 states have call successors, (141), 35 states have call predecessors, (141), 34 states have return successors, (139), 138 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-18 23:57:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 512 transitions. [2022-03-18 23:57:44,866 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 512 transitions. Word has length 176 [2022-03-18 23:57:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:57:44,867 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 512 transitions. [2022-03-18 23:57:44,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-18 23:57:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 512 transitions. [2022-03-18 23:57:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 23:57:44,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:57:44,869 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:57:44,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 23:57:45,083 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 [2022-03-18 23:57:45,083 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:57:45,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:57:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash 980979816, now seen corresponding path program 3 times [2022-03-18 23:57:45,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:57:45,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817814783] [2022-03-18 23:57:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:57:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:57:45,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:57:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017683563] [2022-03-18 23:57:45,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:57:45,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:57:45,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:57:45,099 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) [2022-03-18 23:57:45,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 23:57:45,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 23:57:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:57:45,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 23:57:45,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:57:46,506 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:57:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2022-03-18 23:57:48,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:57:49,664 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:58:30,766 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:00:24,380 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:02:41,096 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-03-19 00:03:43,067 WARN L855 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) is different from true [2022-03-19 00:04:13,141 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-19 00:04:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 126 proven. 79 refuted. 12 times theorem prover too weak. 1090 trivial. 2 not checked. [2022-03-19 00:04:22,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:04:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817814783] [2022-03-19 00:04:22,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:04:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017683563] [2022-03-19 00:04:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017683563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:04:22,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:04:22,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2022-03-19 00:04:22,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724020947] [2022-03-19 00:04:22,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:04:22,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 00:04:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:04:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 00:04:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=555, Unknown=4, NotChecked=150, Total=812 [2022-03-19 00:04:22,620 INFO L87 Difference]: Start difference. First operand 381 states and 512 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) [2022-03-19 00:04:26,635 WARN L855 $PredicateComparison]: unable to prove that (and (<= 1 |c___VERIFIER_assert_#in~cond|) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-03-19 00:04:28,639 WARN L855 $PredicateComparison]: unable to prove that (and (<= 1 c___VERIFIER_assert_~cond) (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from true [2022-03-19 00:04:38,731 WARN L855 $PredicateComparison]: unable to prove that (and (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from true [2022-03-19 00:04:42,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:04:50,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:04:52,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:04:54,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:05:10,647 WARN L232 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 106 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 00:05:39,723 WARN L232 SmtUtils]: Spent 27.97s on a formula simplification. DAG size of input: 94 DAG size of output: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 00:05:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:05:46,528 INFO L93 Difference]: Finished difference Result 479 states and 655 transitions. [2022-03-19 00:05:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 00:05:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) Word has length 182 [2022-03-19 00:05:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:05:46,530 INFO L225 Difference]: With dead ends: 479 [2022-03-19 00:05:46,531 INFO L226 Difference]: Without dead ends: 471 [2022-03-19 00:05:46,532 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 87.4s TimeCoverageRelationStatistics Valid=726, Invalid=2829, Unknown=9, NotChecked=726, Total=4290 [2022-03-19 00:05:46,532 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 81 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 143 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-03-19 00:05:46,533 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 659 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 668 Invalid, 4 Unknown, 295 Unchecked, 14.8s Time] [2022-03-19 00:05:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-19 00:05:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 418. [2022-03-19 00:05:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 224 states have (on average 1.1205357142857142) internal successors, (251), 227 states have internal predecessors, (251), 157 states have call successors, (157), 37 states have call predecessors, (157), 36 states have return successors, (155), 153 states have call predecessors, (155), 155 states have call successors, (155) [2022-03-19 00:05:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 563 transitions. [2022-03-19 00:05:46,725 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 563 transitions. Word has length 182 [2022-03-19 00:05:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:05:46,725 INFO L478 AbstractCegarLoop]: Abstraction has 418 states and 563 transitions. [2022-03-19 00:05:46,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) [2022-03-19 00:05:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 563 transitions. [2022-03-19 00:05:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-19 00:05:46,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:05:46,728 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 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] [2022-03-19 00:05:46,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 00:05:46,934 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 [2022-03-19 00:05:46,934 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:05:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:05:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 107823089, now seen corresponding path program 5 times [2022-03-19 00:05:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:05:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126352027] [2022-03-19 00:05:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:05:46,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:05:46,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:05:46,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567443235] [2022-03-19 00:05:46,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 00:05:46,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:05:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:05:46,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:05:46,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 00:05:47,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-19 00:05:47,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:05:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-19 00:05:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:05:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 260 proven. 341 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2022-03-19 00:05:51,071 INFO L328 TraceCheckSpWp]: Computing backward predicates...