/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 23:54:04,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 23:54:04,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 23:54:04,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 23:54:04,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 23:54:04,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 23:54:04,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 23:54:04,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 23:54:04,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 23:54:04,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 23:54:04,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 23:54:04,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 23:54:04,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 23:54:04,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 23:54:04,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 23:54:04,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 23:54:04,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 23:54:04,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 23:54:04,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 23:54:04,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 23:54:04,151 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 23:54:04,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 23:54:04,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 23:54:04,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 23:54:04,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 23:54:04,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 23:54:04,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 23:54:04,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 23:54:04,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 23:54:04,166 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 23:54:04,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 23:54:04,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 23:54:04,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 23:54:04,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 23:54:04,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 23:54:04,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 23:54:04,189 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 23:54:04,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 23:54:04,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 23:54:04,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 23:54:04,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:54:04,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 23:54:04,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 23:54:04,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 23:54:04,192 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 23:54:04,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 23:54:04,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 23:54:04,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 23:54:04,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 23:54:04,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 23:54:04,373 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 23:54:04,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-03-18 23:54:04,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a541905a8/04ce0d5442994c8d9421a23821e630a6/FLAG71ea5b896 [2022-03-18 23:54:04,791 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 23:54:04,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-03-18 23:54:04,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a541905a8/04ce0d5442994c8d9421a23821e630a6/FLAG71ea5b896 [2022-03-18 23:54:04,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a541905a8/04ce0d5442994c8d9421a23821e630a6 [2022-03-18 23:54:04,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 23:54:04,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 23:54:04,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 23:54:04,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 23:54:04,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 23:54:04,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:54:04" (1/1) ... [2022-03-18 23:54:04,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33341470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:04, skipping insertion in model container [2022-03-18 23:54:04,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:54:04" (1/1) ... [2022-03-18 23:54:04,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 23:54:04,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 23:54:04,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-03-18 23:54:05,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:54:05,019 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 23:54:05,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-03-18 23:54:05,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:54:05,039 INFO L208 MainTranslator]: Completed translation [2022-03-18 23:54:05,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05 WrapperNode [2022-03-18 23:54:05,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 23:54:05,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 23:54:05,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 23:54:05,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 23:54:05,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 23:54:05,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 23:54:05,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 23:54:05,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 23:54:05,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:54:05,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:05,102 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 23:54:05,120 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 23:54:05,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 23:54:05,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 23:54:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 23:54:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 23:54:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 23:54:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 23:54:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 23:54:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 23:54:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 23:54:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 23:54:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 23:54:05,194 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 23:54:05,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 23:54:05,313 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 23:54:05,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 23:54:05,317 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 23:54:05,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:54:05 BoogieIcfgContainer [2022-03-18 23:54:05,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 23:54:05,319 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 23:54:05,319 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 23:54:05,332 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 23:54:05,334 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:54:05" (1/1) ... [2022-03-18 23:54:05,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:54:05 BasicIcfg [2022-03-18 23:54:05,353 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 23:54:05,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 23:54:05,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 23:54:05,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 23:54:05,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:54:04" (1/4) ... [2022-03-18 23:54:05,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f320154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:54:05, skipping insertion in model container [2022-03-18 23:54:05,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:54:05" (2/4) ... [2022-03-18 23:54:05,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f320154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:54:05, skipping insertion in model container [2022-03-18 23:54:05,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:54:05" (3/4) ... [2022-03-18 23:54:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f320154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:54:05, skipping insertion in model container [2022-03-18 23:54:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:54:05" (4/4) ... [2022-03-18 23:54:05,371 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.cqvasr [2022-03-18 23:54:05,384 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 23:54:05,385 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 23:54:05,415 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 23:54:05,420 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 23:54:05,420 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 23:54:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 23:54:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 23:54:05,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:05,452 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:05,453 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-18 23:54:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:05,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340929860] [2022-03-18 23:54:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:54:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:54:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 23:54:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 23:54:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 23:54:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:54:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340929860] [2022-03-18 23:54:05,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340929860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:54:05,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:54:05,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 23:54:05,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572857088] [2022-03-18 23:54:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:05,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 23:54:05,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 23:54:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:54:05,697 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:54:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:05,780 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-18 23:54:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 23:54:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 23:54:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:05,790 INFO L225 Difference]: With dead ends: 73 [2022-03-18 23:54:05,790 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 23:54:05,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:54:05,797 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:05,798 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:54:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 23:54:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 23:54:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 23:54:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-18 23:54:05,829 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-18 23:54:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:05,830 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-18 23:54:05,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:54:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-18 23:54:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 23:54:05,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:05,843 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:05,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 23:54:05,843 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-18 23:54:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:05,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425506634] [2022-03-18 23:54:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:05,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540821296] [2022-03-18 23:54:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:05,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:05,892 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 23:54:05,911 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 23:54:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:05,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:54:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:54:06,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:54:06,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425506634] [2022-03-18 23:54:06,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540821296] [2022-03-18 23:54:06,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540821296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:54:06,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:54:06,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 23:54:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980052916] [2022-03-18 23:54:06,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:06,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 23:54:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 23:54:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:54:06,120 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:54:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:06,198 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-18 23:54:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:54:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-18 23:54:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:06,199 INFO L225 Difference]: With dead ends: 54 [2022-03-18 23:54:06,199 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 23:54:06,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 23:54:06,201 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:06,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 23:54:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-18 23:54:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 23:54:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-18 23:54:06,209 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-18 23:54:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:06,210 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-18 23:54:06,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:54:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-18 23:54:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 23:54:06,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:06,211 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:06,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 23:54:06,435 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 23:54:06,435 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-18 23:54:06,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:06,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895269276] [2022-03-18 23:54:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:06,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:06,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409906196] [2022-03-18 23:54:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:06,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:06,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:06,450 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 23:54:06,451 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 23:54:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:06,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 23:54:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 23:54:06,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:54:06,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895269276] [2022-03-18 23:54:06,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409906196] [2022-03-18 23:54:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409906196] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:54:06,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:54:06,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 23:54:06,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932097415] [2022-03-18 23:54:06,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:06,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:54:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:54:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:54:06,808 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:54:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:06,844 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-18 23:54:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:54:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-18 23:54:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:06,845 INFO L225 Difference]: With dead ends: 53 [2022-03-18 23:54:06,845 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 23:54:06,846 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:54:06,846 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:06,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 23:54:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 23:54:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 23:54:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-18 23:54:06,860 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-18 23:54:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:06,860 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-18 23:54:06,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:54:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-18 23:54:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 23:54:06,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:06,861 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:06,880 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 23:54:07,062 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 23:54:07,062 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-18 23:54:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:07,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590331182] [2022-03-18 23:54:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:07,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:07,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:07,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922220428] [2022-03-18 23:54:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:07,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:07,075 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 23:54:07,081 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 23:54:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:54:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:54:07,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:54:07,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590331182] [2022-03-18 23:54:07,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922220428] [2022-03-18 23:54:07,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922220428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:07,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:07,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 23:54:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412432654] [2022-03-18 23:54:07,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:07,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 23:54:07,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 23:54:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 23:54:07,302 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:54:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:07,450 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-18 23:54:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 23:54:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-18 23:54:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:07,454 INFO L225 Difference]: With dead ends: 103 [2022-03-18 23:54:07,457 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 23:54:07,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:54:07,463 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:07,464 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:54:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 23:54:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-18 23:54:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 23:54:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-18 23:54:07,493 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-18 23:54:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:07,494 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-18 23:54:07,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:54:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-18 23:54:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 23:54:07,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:07,496 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:07,515 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 23:54:07,711 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 23:54:07,712 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-18 23:54:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:07,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683408976] [2022-03-18 23:54:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:07,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:07,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316512864] [2022-03-18 23:54:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:07,725 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 23:54:07,731 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 23:54:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 23:54:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 23:54:08,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:54:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:08,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683408976] [2022-03-18 23:54:08,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:08,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316512864] [2022-03-18 23:54:08,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316512864] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 23:54:08,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:54:08,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-18 23:54:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328056919] [2022-03-18 23:54:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:08,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 23:54:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 23:54:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:54:08,246 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 23:54:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:08,303 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-18 23:54:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 23:54:08,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-18 23:54:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:08,305 INFO L225 Difference]: With dead ends: 79 [2022-03-18 23:54:08,305 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 23:54:08,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-18 23:54:08,306 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:08,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 23:54:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-18 23:54:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 23:54:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-18 23:54:08,315 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-18 23:54:08,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:08,315 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-18 23:54:08,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 23:54:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-18 23:54:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 23:54:08,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:08,316 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:08,333 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 23:54:08,531 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 23:54:08,531 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-18 23:54:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:08,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699263280] [2022-03-18 23:54:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:08,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:08,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968124414] [2022-03-18 23:54:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:08,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:08,541 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 23:54:08,542 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 23:54:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 23:54:08,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 23:54:08,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:54:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699263280] [2022-03-18 23:54:09,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968124414] [2022-03-18 23:54:09,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968124414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:09,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:09,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-18 23:54:09,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266497788] [2022-03-18 23:54:09,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:09,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 23:54:09,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 23:54:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-18 23:54:09,049 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 23:54:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:09,391 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-18 23:54:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 23:54:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-18 23:54:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:09,392 INFO L225 Difference]: With dead ends: 118 [2022-03-18 23:54:09,393 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 23:54:09,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-18 23:54:09,393 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:09,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 23:54:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 23:54:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-18 23:54:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 23:54:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-18 23:54:09,410 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-18 23:54:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:09,410 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-18 23:54:09,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 23:54:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-18 23:54:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 23:54:09,411 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:09,411 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:09,445 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 23:54:09,623 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 23:54:09,624 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-18 23:54:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125930824] [2022-03-18 23:54:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:09,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62796241] [2022-03-18 23:54:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:09,634 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 23:54:09,635 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 23:54:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:54:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 23:54:09,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:54:09,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125930824] [2022-03-18 23:54:09,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62796241] [2022-03-18 23:54:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62796241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:54:09,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:54:09,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:54:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70669678] [2022-03-18 23:54:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:09,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:54:09,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:54:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:54:09,731 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:54:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:09,766 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-18 23:54:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:54:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-18 23:54:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:09,768 INFO L225 Difference]: With dead ends: 151 [2022-03-18 23:54:09,768 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 23:54:09,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:54:09,769 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:09,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 23:54:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-18 23:54:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-18 23:54:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-18 23:54:09,787 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-18 23:54:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:09,788 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-18 23:54:09,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 23:54:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-18 23:54:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 23:54:09,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:09,789 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:09,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 23:54:09,995 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 23:54:09,996 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-03-18 23:54:09,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:09,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208699013] [2022-03-18 23:54:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:09,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:10,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:10,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770022316] [2022-03-18 23:54:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:10,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:10,009 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 23:54:10,011 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 23:54:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 23:54:10,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 23:54:10,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:54:10,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:10,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208699013] [2022-03-18 23:54:10,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:10,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770022316] [2022-03-18 23:54:10,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770022316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:10,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:10,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-18 23:54:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850530037] [2022-03-18 23:54:10,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:10,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 23:54:10,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 23:54:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-18 23:54:10,478 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 23:54:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:13,255 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-03-18 23:54:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 23:54:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-03-18 23:54:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:13,258 INFO L225 Difference]: With dead ends: 190 [2022-03-18 23:54:13,258 INFO L226 Difference]: Without dead ends: 188 [2022-03-18 23:54:13,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 23:54:13,259 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:13,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 288 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 23:54:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-18 23:54:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-03-18 23:54:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 23:54:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-03-18 23:54:13,290 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-03-18 23:54:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:13,290 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-03-18 23:54:13,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 23:54:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-03-18 23:54:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 23:54:13,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:13,294 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:13,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 23:54:13,499 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 23:54:13,500 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-03-18 23:54:13,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:13,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255580299] [2022-03-18 23:54:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:13,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:13,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106436407] [2022-03-18 23:54:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:54:13,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:13,519 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 23:54:13,520 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 23:54:13,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:54:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:54:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 23:54:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:54:13,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:54:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255580299] [2022-03-18 23:54:13,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106436407] [2022-03-18 23:54:13,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106436407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:54:13,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:54:13,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:54:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16056342] [2022-03-18 23:54:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:13,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:54:13,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:54:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:54:13,638 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:54:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:13,705 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-03-18 23:54:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:54:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-18 23:54:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:13,706 INFO L225 Difference]: With dead ends: 225 [2022-03-18 23:54:13,706 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 23:54:13,707 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:54:13,707 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:13,708 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 23:54:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-18 23:54:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-18 23:54:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-03-18 23:54:13,738 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-03-18 23:54:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:13,739 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-03-18 23:54:13,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 23:54:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-03-18 23:54:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 23:54:13,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:13,741 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:13,760 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 23:54:13,960 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 23:54:13,960 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-18 23:54:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:13,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104361632] [2022-03-18 23:54:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:13,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:13,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577053794] [2022-03-18 23:54:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:13,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:13,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:13,969 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 23:54:13,970 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 23:54:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:54:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 23:54:14,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:54:14,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104361632] [2022-03-18 23:54:14,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577053794] [2022-03-18 23:54:14,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577053794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:54:14,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:54:14,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:54:14,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258319349] [2022-03-18 23:54:14,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:14,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:54:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:54:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:54:14,082 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 23:54:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:14,131 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-03-18 23:54:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:54:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-18 23:54:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:14,133 INFO L225 Difference]: With dead ends: 167 [2022-03-18 23:54:14,133 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 23:54:14,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:54:14,133 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:14,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 23:54:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-18 23:54:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 23:54:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-18 23:54:14,152 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-18 23:54:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:14,152 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-18 23:54:14,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 23:54:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-18 23:54:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 23:54:14,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:14,153 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:14,172 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 23:54:14,367 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 23:54:14,367 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-18 23:54:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224568768] [2022-03-18 23:54:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:14,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314479185] [2022-03-18 23:54:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:14,381 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 23:54:14,409 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 23:54:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 23:54:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 23:54:14,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 23:54:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:15,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224568768] [2022-03-18 23:54:15,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:15,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314479185] [2022-03-18 23:54:15,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314479185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:15,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:15,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-18 23:54:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224002687] [2022-03-18 23:54:15,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:15,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 23:54:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 23:54:15,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-18 23:54:15,270 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-18 23:54:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:20,968 INFO L93 Difference]: Finished difference Result 294 states and 426 transitions. [2022-03-18 23:54:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 23:54:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-03-18 23:54:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:20,970 INFO L225 Difference]: With dead ends: 294 [2022-03-18 23:54:20,971 INFO L226 Difference]: Without dead ends: 290 [2022-03-18 23:54:20,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 23:54:20,972 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 134 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:20,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 462 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 23:54:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-18 23:54:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-03-18 23:54:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 23:54:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-03-18 23:54:21,024 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-03-18 23:54:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:21,025 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-03-18 23:54:21,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-18 23:54:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-03-18 23:54:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 23:54:21,025 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:21,025 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:21,043 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 23:54:21,239 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 23:54:21,239 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-03-18 23:54:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039220153] [2022-03-18 23:54:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:21,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:21,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156659846] [2022-03-18 23:54:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:21,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:21,252 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 23:54:21,253 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 23:54:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:21,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 23:54:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 23:54:21,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 23:54:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039220153] [2022-03-18 23:54:21,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156659846] [2022-03-18 23:54:21,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156659846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:21,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:21,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-03-18 23:54:21,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460820829] [2022-03-18 23:54:21,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:21,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:54:21,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:21,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:54:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:54:21,596 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-18 23:54:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:21,778 INFO L93 Difference]: Finished difference Result 347 states and 502 transitions. [2022-03-18 23:54:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 23:54:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-03-18 23:54:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:21,781 INFO L225 Difference]: With dead ends: 347 [2022-03-18 23:54:21,781 INFO L226 Difference]: Without dead ends: 345 [2022-03-18 23:54:21,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 23:54:21,781 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:21,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:54:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-18 23:54:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-03-18 23:54:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 23:54:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-03-18 23:54:21,827 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-03-18 23:54:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:21,827 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-03-18 23:54:21,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-18 23:54:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-03-18 23:54:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-18 23:54:21,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:21,828 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:21,846 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 23:54:22,044 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 23:54:22,044 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-03-18 23:54:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591607771] [2022-03-18 23:54:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:22,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623922335] [2022-03-18 23:54:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:22,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:22,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:22,053 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 23:54:22,054 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 23:54:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 23:54:22,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-18 23:54:22,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-18 23:54:22,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:22,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591607771] [2022-03-18 23:54:22,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:22,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623922335] [2022-03-18 23:54:22,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623922335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:22,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:22,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-18 23:54:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135845429] [2022-03-18 23:54:22,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:22,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 23:54:22,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 23:54:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 23:54:22,490 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 23:54:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:22,838 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2022-03-18 23:54:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:54:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-18 23:54:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:22,840 INFO L225 Difference]: With dead ends: 323 [2022-03-18 23:54:22,840 INFO L226 Difference]: Without dead ends: 321 [2022-03-18 23:54:22,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-18 23:54:22,842 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 80 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:22,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 294 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 23:54:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-18 23:54:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-03-18 23:54:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 23:54:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-03-18 23:54:22,896 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-03-18 23:54:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:22,896 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-03-18 23:54:22,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 23:54:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-03-18 23:54:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 23:54:22,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:22,897 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:22,916 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 23:54:23,114 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 23:54:23,114 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-03-18 23:54:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:23,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686267251] [2022-03-18 23:54:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:23,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:23,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018233108] [2022-03-18 23:54:23,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:54:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:23,125 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 23:54:23,126 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 23:54:23,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:54:23,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:54:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 23:54:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 23:54:23,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:54:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:23,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686267251] [2022-03-18 23:54:23,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:23,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018233108] [2022-03-18 23:54:23,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018233108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:54:23,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:54:23,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:54:23,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831679549] [2022-03-18 23:54:23,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:54:23,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:54:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:54:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:54:23,250 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 23:54:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:23,333 INFO L93 Difference]: Finished difference Result 449 states and 606 transitions. [2022-03-18 23:54:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:54:23,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-18 23:54:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:23,334 INFO L225 Difference]: With dead ends: 449 [2022-03-18 23:54:23,334 INFO L226 Difference]: Without dead ends: 264 [2022-03-18 23:54:23,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:54:23,336 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:23,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:54:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-18 23:54:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-03-18 23:54:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-18 23:54:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-03-18 23:54:23,386 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-03-18 23:54:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:23,386 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-03-18 23:54:23,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 23:54:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-03-18 23:54:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 23:54:23,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:23,387 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:23,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 23:54:23,589 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 23:54:23,590 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-03-18 23:54:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:23,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223427846] [2022-03-18 23:54:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:23,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229475886] [2022-03-18 23:54:23,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:54:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:23,600 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 23:54:23,601 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 23:54:23,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 23:54:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:54:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 23:54:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-18 23:54:24,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:25,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:54:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 23:54:31,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:31,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223427846] [2022-03-18 23:54:31,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:31,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229475886] [2022-03-18 23:54:31,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229475886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:31,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:31,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-18 23:54:31,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363918017] [2022-03-18 23:54:31,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:31,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 23:54:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:31,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 23:54:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2022-03-18 23:54:31,540 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 23:54:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:54:52,402 INFO L93 Difference]: Finished difference Result 379 states and 508 transitions. [2022-03-18 23:54:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 23:54:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-03-18 23:54:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:54:52,404 INFO L225 Difference]: With dead ends: 379 [2022-03-18 23:54:52,404 INFO L226 Difference]: Without dead ends: 377 [2022-03-18 23:54:52,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=840, Invalid=3715, Unknown=1, NotChecked=0, Total=4556 [2022-03-18 23:54:52,406 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 271 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:54:52,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 634 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1219 Invalid, 0 Unknown, 164 Unchecked, 5.3s Time] [2022-03-18 23:54:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-18 23:54:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2022-03-18 23:54:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 222 states have (on average 1.1711711711711712) internal successors, (260), 226 states have internal predecessors, (260), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 108 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-18 23:54:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 484 transitions. [2022-03-18 23:54:52,503 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 484 transitions. Word has length 77 [2022-03-18 23:54:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:54:52,503 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 484 transitions. [2022-03-18 23:54:52,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 23:54:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 484 transitions. [2022-03-18 23:54:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 23:54:52,504 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:54:52,504 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:54:52,521 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 23:54:52,720 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 23:54:52,721 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:54:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:54:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-03-18 23:54:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:54:52,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755588851] [2022-03-18 23:54:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:52,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:54:52,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:54:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119163930] [2022-03-18 23:54:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:54:52,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:54:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:54:52,733 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 23:54:52,734 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 23:54:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:54:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 23:54:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:54:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 23:54:53,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:54:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-18 23:54:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:54:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755588851] [2022-03-18 23:54:54,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:54:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119163930] [2022-03-18 23:54:54,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119163930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:54:54,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:54:54,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-18 23:54:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708891257] [2022-03-18 23:54:54,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:54:54,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 23:54:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:54:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 23:54:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-18 23:54:54,572 INFO L87 Difference]: Start difference. First operand 359 states and 484 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 23:54:59,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:02,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:05,388 WARN L534 Checker$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 23:55:09,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:12,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:16,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:20,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:22,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:24,701 WARN L534 Checker$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 23:55:26,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:29,269 WARN L534 Checker$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 23:55:34,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:36,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:44,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 7.85s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:55:46,630 WARN L534 Checker$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 23:55:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:48,498 INFO L93 Difference]: Finished difference Result 590 states and 839 transitions. [2022-03-18 23:55:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 23:55:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-03-18 23:55:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:48,501 INFO L225 Difference]: With dead ends: 590 [2022-03-18 23:55:48,501 INFO L226 Difference]: Without dead ends: 586 [2022-03-18 23:55:48,502 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=755, Invalid=3405, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 23:55:48,502 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 170 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 399 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.4s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:48,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 787 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1526 Invalid, 10 Unknown, 0 Unchecked, 47.4s Time] [2022-03-18 23:55:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-18 23:55:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 553. [2022-03-18 23:55:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 318 states have (on average 1.2075471698113207) internal successors, (384), 322 states have internal predecessors, (384), 205 states have call successors, (205), 30 states have call predecessors, (205), 29 states have return successors, (203), 200 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-18 23:55:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 792 transitions. [2022-03-18 23:55:48,680 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 792 transitions. Word has length 91 [2022-03-18 23:55:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:48,680 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 792 transitions. [2022-03-18 23:55:48,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 23:55:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 792 transitions. [2022-03-18 23:55:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 23:55:48,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:48,681 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:48,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-18 23:55:48,896 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 23:55:48,897 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-03-18 23:55:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:48,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111165662] [2022-03-18 23:55:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:48,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343637973] [2022-03-18 23:55:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:48,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:48,904 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 23:55:48,904 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 23:55:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:55:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 23:55:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-18 23:55:49,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-18 23:55:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111165662] [2022-03-18 23:55:49,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343637973] [2022-03-18 23:55:49,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343637973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:49,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:49,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 23:55:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812563777] [2022-03-18 23:55:49,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:49,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 23:55:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 23:55:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-18 23:55:49,955 INFO L87 Difference]: Start difference. First operand 553 states and 792 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-18 23:55:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:52,067 INFO L93 Difference]: Finished difference Result 1263 states and 1956 transitions. [2022-03-18 23:55:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 23:55:52,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-03-18 23:55:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:52,074 INFO L225 Difference]: With dead ends: 1263 [2022-03-18 23:55:52,074 INFO L226 Difference]: Without dead ends: 1261 [2022-03-18 23:55:52,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-03-18 23:55:52,075 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 97 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:52,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 479 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 23:55:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-03-18 23:55:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1153. [2022-03-18 23:55:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 564 states have (on average 1.303191489361702) internal successors, (735), 568 states have internal predecessors, (735), 553 states have call successors, (553), 36 states have call predecessors, (553), 35 states have return successors, (551), 548 states have call predecessors, (551), 551 states have call successors, (551) [2022-03-18 23:55:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1839 transitions. [2022-03-18 23:55:52,564 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1839 transitions. Word has length 94 [2022-03-18 23:55:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:52,564 INFO L478 AbstractCegarLoop]: Abstraction has 1153 states and 1839 transitions. [2022-03-18 23:55:52,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-18 23:55:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1839 transitions. [2022-03-18 23:55:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 23:55:52,565 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:52,565 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:52,582 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 23:55:52,775 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 23:55:52,775 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-03-18 23:55:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:52,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875464883] [2022-03-18 23:55:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:52,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:52,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268332619] [2022-03-18 23:55:52,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:55:52,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:52,784 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 23:55:52,785 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 23:55:52,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:55:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:55:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 23:55:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-18 23:55:52,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-18 23:55:53,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:55:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875464883] [2022-03-18 23:55:53,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:55:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268332619] [2022-03-18 23:55:53,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268332619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:55:53,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:55:53,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-03-18 23:55:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473960207] [2022-03-18 23:55:53,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:55:53,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 23:55:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:55:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 23:55:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:55:53,116 INFO L87 Difference]: Start difference. First operand 1153 states and 1839 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 23:55:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:55:54,058 INFO L93 Difference]: Finished difference Result 1367 states and 2176 transitions. [2022-03-18 23:55:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 23:55:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-03-18 23:55:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:55:54,063 INFO L225 Difference]: With dead ends: 1367 [2022-03-18 23:55:54,063 INFO L226 Difference]: Without dead ends: 1360 [2022-03-18 23:55:54,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-03-18 23:55:54,064 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:55:54,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 23:55:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-03-18 23:55:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1125. [2022-03-18 23:55:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 542 states have (on average 1.311808118081181) internal successors, (711), 545 states have internal predecessors, (711), 547 states have call successors, (547), 36 states have call predecessors, (547), 35 states have return successors, (545), 543 states have call predecessors, (545), 545 states have call successors, (545) [2022-03-18 23:55:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1803 transitions. [2022-03-18 23:55:54,562 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1803 transitions. Word has length 99 [2022-03-18 23:55:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:55:54,562 INFO L478 AbstractCegarLoop]: Abstraction has 1125 states and 1803 transitions. [2022-03-18 23:55:54,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 23:55:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1803 transitions. [2022-03-18 23:55:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 23:55:54,565 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:55:54,565 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:55:54,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 23:55:54,779 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 [2022-03-18 23:55:54,780 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:55:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:55:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash -650677581, now seen corresponding path program 1 times [2022-03-18 23:55:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:55:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618941818] [2022-03-18 23:55:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:54,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:55:54,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:55:54,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616061456] [2022-03-18 23:55:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:55:54,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:55:54,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:55:54,791 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) [2022-03-18 23:55:54,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 23:55:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:55:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 23:55:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:55:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 71 proven. 87 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-18 23:55:55,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:55:56,441 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 23:56:00,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:56:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618941818] [2022-03-18 23:56:00,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:56:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616061456] [2022-03-18 23:56:00,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616061456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:56:00,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:56:00,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 23:56:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886858322] [2022-03-18 23:56:00,747 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:56:00,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 23:56:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:56:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 23:56:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=492, Unknown=2, NotChecked=0, Total=600 [2022-03-18 23:56:00,748 INFO L87 Difference]: Start difference. First operand 1125 states and 1803 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:56:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:56:02,056 INFO L93 Difference]: Finished difference Result 1319 states and 2112 transitions. [2022-03-18 23:56:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 23:56:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 119 [2022-03-18 23:56:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:56:02,066 INFO L225 Difference]: With dead ends: 1319 [2022-03-18 23:56:02,066 INFO L226 Difference]: Without dead ends: 1317 [2022-03-18 23:56:02,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=204, Invalid=916, Unknown=2, NotChecked=0, Total=1122 [2022-03-18 23:56:02,067 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 59 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 23:56:02,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 523 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 23:56:02,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-03-18 23:56:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1306. [2022-03-18 23:56:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 626 states have (on average 1.3146964856230032) internal successors, (823), 629 states have internal predecessors, (823), 639 states have call successors, (639), 41 states have call predecessors, (639), 40 states have return successors, (637), 635 states have call predecessors, (637), 637 states have call successors, (637) [2022-03-18 23:56:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2099 transitions. [2022-03-18 23:56:02,639 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2099 transitions. Word has length 119 [2022-03-18 23:56:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:56:02,640 INFO L478 AbstractCegarLoop]: Abstraction has 1306 states and 2099 transitions. [2022-03-18 23:56:02,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 23:56:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2099 transitions. [2022-03-18 23:56:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 23:56:02,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:56:02,641 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:56:02,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-18 23:56:02,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:56:02,855 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:56:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:56:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1360080806, now seen corresponding path program 2 times [2022-03-18 23:56:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:56:02,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851953354] [2022-03-18 23:56:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:56:02,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:56:02,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:56:02,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459023012] [2022-03-18 23:56:02,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:56:02,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:56:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:56:02,863 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:56:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 23:56:02,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:56:02,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:56:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 23:56:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:56:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 111 proven. 90 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-03-18 23:56:04,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:56:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 146 proven. 19 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-18 23:56:07,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:56:07,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851953354] [2022-03-18 23:56:07,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:56:07,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459023012] [2022-03-18 23:56:07,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459023012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:56:07,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:56:07,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-18 23:56:07,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624500353] [2022-03-18 23:56:07,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:56:07,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 23:56:07,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:56:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 23:56:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-18 23:56:07,380 INFO L87 Difference]: Start difference. First operand 1306 states and 2099 transitions. Second operand has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-18 23:56:10,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:11,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:15,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:20,507 WARN L534 Checker$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 23:56:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:56:21,035 INFO L93 Difference]: Finished difference Result 1526 states and 2437 transitions. [2022-03-18 23:56:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 23:56:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) Word has length 124 [2022-03-18 23:56:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:56:21,042 INFO L225 Difference]: With dead ends: 1526 [2022-03-18 23:56:21,042 INFO L226 Difference]: Without dead ends: 1524 [2022-03-18 23:56:21,043 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 23:56:21,043 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 99 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 224 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-03-18 23:56:21,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 809 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1224 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2022-03-18 23:56:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-03-18 23:56:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1488. [2022-03-18 23:56:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 710 states have (on average 1.3169014084507042) internal successors, (935), 713 states have internal predecessors, (935), 731 states have call successors, (731), 47 states have call predecessors, (731), 46 states have return successors, (729), 727 states have call predecessors, (729), 729 states have call successors, (729) [2022-03-18 23:56:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2395 transitions. [2022-03-18 23:56:21,749 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2395 transitions. Word has length 124 [2022-03-18 23:56:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:56:21,749 INFO L478 AbstractCegarLoop]: Abstraction has 1488 states and 2395 transitions. [2022-03-18 23:56:21,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-18 23:56:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2395 transitions. [2022-03-18 23:56:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 23:56:21,751 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:56:21,751 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:56:21,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 23:56:21,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:56:21,959 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:56:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:56:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -439137229, now seen corresponding path program 2 times [2022-03-18 23:56:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:56:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642985392] [2022-03-18 23:56:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:56:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:56:21,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:56:21,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266101717] [2022-03-18 23:56:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:56:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:56:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:56:21,967 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:56:21,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 23:56:22,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:56:22,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:56:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 23:56:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:56:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-18 23:56:23,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:56:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-18 23:56:29,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:56:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642985392] [2022-03-18 23:56:29,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:56:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266101717] [2022-03-18 23:56:29,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266101717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:56:29,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:56:29,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-18 23:56:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786037813] [2022-03-18 23:56:29,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:56:29,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 23:56:29,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:56:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 23:56:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-18 23:56:29,017 INFO L87 Difference]: Start difference. First operand 1488 states and 2395 transitions. Second operand has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-03-18 23:56:35,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:40,220 WARN L534 Checker$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 23:56:46,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:56:48,296 WARN L534 Checker$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 23:56:58,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:01,834 WARN L534 Checker$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 23:57:03,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:08,584 WARN L534 Checker$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 23:57:10,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:12,592 WARN L534 Checker$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 23:57:38,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:44,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:46,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:48,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:50,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:55,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:57:59,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:09,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:21,947 WARN L232 SmtUtils]: Spent 7.75s on a formula simplification. DAG size of input: 90 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:58:23,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:24,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:28,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:30,268 WARN L534 Checker$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 23:58:31,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:33,585 WARN L534 Checker$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 23:58:35,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:37,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:58:59,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:01,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:12,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:17,218 WARN L534 Checker$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 23:59:19,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:25,696 WARN L534 Checker$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 23:59:27,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:31,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:33,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:43,766 WARN L232 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 87 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:59:47,289 WARN L534 Checker$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 23:59:48,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:51,471 WARN L534 Checker$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 23:59:52,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:57,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:59:58,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:04,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:06,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:23,364 WARN L232 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 00:00:29,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:32,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:33,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:40,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:42,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:45,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:53,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:55,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:00:59,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:01:05,214 WARN L232 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 108 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 00:01:18,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:01:21,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:01:24,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:01:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:01:26,553 INFO L93 Difference]: Finished difference Result 2973 states and 4921 transitions. [2022-03-19 00:01:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 00:01:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 138 [2022-03-19 00:01:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:01:26,565 INFO L225 Difference]: With dead ends: 2973 [2022-03-19 00:01:26,566 INFO L226 Difference]: Without dead ends: 2965 [2022-03-19 00:01:26,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 260 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4662 ImplicationChecksByTransitivity, 120.3s TimeCoverageRelationStatistics Valid=1850, Invalid=12192, Unknown=0, NotChecked=0, Total=14042 [2022-03-19 00:01:26,569 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 188 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 3716 mSolverCounterSat, 587 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 3716 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.4s IncrementalHoareTripleChecker+Time [2022-03-19 00:01:26,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1778 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 3716 Invalid, 43 Unknown, 0 Unchecked, 180.4s Time] [2022-03-19 00:01:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-03-19 00:01:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2408. [2022-03-19 00:01:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 1077 states have (on average 1.3546889507892292) internal successors, (1459), 1080 states have internal predecessors, (1459), 1275 states have call successors, (1275), 56 states have call predecessors, (1275), 55 states have return successors, (1273), 1271 states have call predecessors, (1273), 1273 states have call successors, (1273) [2022-03-19 00:01:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4007 transitions. [2022-03-19 00:01:28,125 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4007 transitions. Word has length 138 [2022-03-19 00:01:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:01:28,126 INFO L478 AbstractCegarLoop]: Abstraction has 2408 states and 4007 transitions. [2022-03-19 00:01:28,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-03-19 00:01:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4007 transitions. [2022-03-19 00:01:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 00:01:28,128 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:01:28,128 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 00:01:28,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 00:01:28,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 00:01:28,343 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:01:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:01:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash -529470484, now seen corresponding path program 3 times [2022-03-19 00:01:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:01:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373312063] [2022-03-19 00:01:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:01:28,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:01:28,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:01:28,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833026342] [2022-03-19 00:01:28,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:01:28,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:01:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:01:28,353 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:01:28,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 00:01:28,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 00:01:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:01:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 00:01:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:01:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 75 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-19 00:01:30,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:01:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-19 00:01:36,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:01:36,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373312063] [2022-03-19 00:01:36,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:01:36,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833026342] [2022-03-19 00:01:36,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833026342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:01:36,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:01:36,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2022-03-19 00:01:36,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546862451] [2022-03-19 00:01:36,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:01:36,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 00:01:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:01:36,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 00:01:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 00:01:36,424 INFO L87 Difference]: Start difference. First operand 2408 states and 4007 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-03-19 00:02:02,066 WARN L232 SmtUtils]: Spent 7.69s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 00:02:04,946 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 00:02:13,812 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 00:03:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:03:51,491 INFO L93 Difference]: Finished difference Result 3905 states and 6514 transitions. [2022-03-19 00:03:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-19 00:03:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 141 [2022-03-19 00:03:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:03:51,505 INFO L225 Difference]: With dead ends: 3905 [2022-03-19 00:03:51,505 INFO L226 Difference]: Without dead ends: 3897 [2022-03-19 00:03:51,510 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8794 ImplicationChecksByTransitivity, 98.3s TimeCoverageRelationStatistics Valid=4107, Invalid=21333, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 00:03:51,510 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 372 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 1131 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 4899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1131 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2022-03-19 00:03:51,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 1913 Invalid, 4899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1131 Valid, 3766 Invalid, 2 Unknown, 0 Unchecked, 38.7s Time] [2022-03-19 00:03:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2022-03-19 00:03:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 2857. [2022-03-19 00:03:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 1293 states have (on average 1.3495746326372777) internal successors, (1745), 1298 states have internal predecessors, (1745), 1503 states have call successors, (1503), 61 states have call predecessors, (1503), 60 states have return successors, (1501), 1497 states have call predecessors, (1501), 1501 states have call successors, (1501) [2022-03-19 00:03:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4749 transitions. [2022-03-19 00:03:53,721 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4749 transitions. Word has length 141 [2022-03-19 00:03:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:03:53,721 INFO L478 AbstractCegarLoop]: Abstraction has 2857 states and 4749 transitions. [2022-03-19 00:03:53,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-03-19 00:03:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4749 transitions. [2022-03-19 00:03:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-19 00:03:53,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:03:53,724 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:03:53,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 00:03:53,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 00:03:53,939 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:03:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:03:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1830452208, now seen corresponding path program 4 times [2022-03-19 00:03:53,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:03:53,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745596435] [2022-03-19 00:03:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:03:53,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:03:53,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:03:53,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963280587] [2022-03-19 00:03:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 00:03:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:03:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:03:53,953 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:03:53,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 00:03:54,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 00:03:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:03:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-19 00:03:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:03:58,577 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:03:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 180 proven. 160 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-03-19 00:03:59,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:04:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 225 proven. 12 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-03-19 00:04:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:04:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745596435] [2022-03-19 00:04:01,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:04:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963280587] [2022-03-19 00:04:01,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963280587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:04:01,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:04:01,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 32 [2022-03-19 00:04:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64194703] [2022-03-19 00:04:01,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:04:01,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 00:04:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:04:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 00:04:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-03-19 00:04:01,758 INFO L87 Difference]: Start difference. First operand 2857 states and 4749 transitions. Second operand has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-19 00:04:06,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:04:08,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:04:11,893 WARN L534 Checker$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 00:04:24,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:04:28,917 WARN L534 Checker$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 00:04:31,272 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 00:04:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:04:35,587 INFO L93 Difference]: Finished difference Result 3347 states and 5542 transitions. [2022-03-19 00:04:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 00:04:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) Word has length 168 [2022-03-19 00:04:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:04:35,613 INFO L225 Difference]: With dead ends: 3347 [2022-03-19 00:04:35,614 INFO L226 Difference]: Without dead ends: 3339 [2022-03-19 00:04:35,615 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 301 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=647, Invalid=4323, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 00:04:35,615 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 216 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 458 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:04:35,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1350 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 3012 Invalid, 4 Unknown, 0 Unchecked, 23.0s Time] [2022-03-19 00:04:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-19 00:04:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3073. [2022-03-19 00:04:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 1360 states have (on average 1.363235294117647) internal successors, (1854), 1363 states have internal predecessors, (1854), 1647 states have call successors, (1647), 66 states have call predecessors, (1647), 65 states have return successors, (1645), 1643 states have call predecessors, (1645), 1645 states have call successors, (1645) [2022-03-19 00:04:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 5146 transitions. [2022-03-19 00:04:38,009 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 5146 transitions. Word has length 168 [2022-03-19 00:04:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:04:38,010 INFO L478 AbstractCegarLoop]: Abstraction has 3073 states and 5146 transitions. [2022-03-19 00:04:38,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-19 00:04:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 5146 transitions. [2022-03-19 00:04:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-19 00:04:38,013 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:04:38,013 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:04:38,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 00:04:38,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:04:38,227 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:04:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:04:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1169142410, now seen corresponding path program 5 times [2022-03-19 00:04:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:04:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447851303] [2022-03-19 00:04:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:04:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:04:38,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:04:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013955081] [2022-03-19 00:04:38,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 00:04:38,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:04:38,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:04:38,235 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:04:38,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 00:04:38,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 00:04:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:04:38,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 00:04:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:04:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 359 proven. 18 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-19 00:04:38,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:04:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 111 proven. 18 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2022-03-19 00:04:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:04:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447851303] [2022-03-19 00:04:38,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:04:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013955081] [2022-03-19 00:04:38,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013955081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:04:38,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:04:38,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-19 00:04:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164734626] [2022-03-19 00:04:38,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:04:38,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 00:04:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:04:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 00:04:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:04:38,796 INFO L87 Difference]: Start difference. First operand 3073 states and 5146 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-03-19 00:04:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:04:41,567 INFO L93 Difference]: Finished difference Result 5673 states and 9569 transitions. [2022-03-19 00:04:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 00:04:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 168 [2022-03-19 00:04:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:04:41,580 INFO L225 Difference]: With dead ends: 5673 [2022-03-19 00:04:41,581 INFO L226 Difference]: Without dead ends: 3452 [2022-03-19 00:04:41,587 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 00:04:41,587 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:04:41,587 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:04:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-03-19 00:04:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 3207. [2022-03-19 00:04:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 1456 states have (on average 1.3537087912087913) internal successors, (1971), 1481 states have internal predecessors, (1971), 1687 states have call successors, (1687), 64 states have call predecessors, (1687), 63 states have return successors, (1685), 1661 states have call predecessors, (1685), 1685 states have call successors, (1685) [2022-03-19 00:04:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 5343 transitions. [2022-03-19 00:04:44,726 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 5343 transitions. Word has length 168 [2022-03-19 00:04:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:04:44,726 INFO L478 AbstractCegarLoop]: Abstraction has 3207 states and 5343 transitions. [2022-03-19 00:04:44,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-03-19 00:04:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 5343 transitions. [2022-03-19 00:04:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-19 00:04:44,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:04:44,731 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 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] [2022-03-19 00:04:44,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 00:04:44,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:04:44,947 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:04:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:04:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 540961160, now seen corresponding path program 3 times [2022-03-19 00:04:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:04:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116855920] [2022-03-19 00:04:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:04:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:04:44,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:04:44,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967273579] [2022-03-19 00:04:44,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:04:44,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:04:44,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:04:44,976 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:04:44,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 00:04:45,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 00:04:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:04:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 00:04:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:04:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 154 proven. 33 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-19 00:04:45,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:04:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 124 proven. 12 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2022-03-19 00:04:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:04:45,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116855920] [2022-03-19 00:04:45,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:04:45,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967273579] [2022-03-19 00:04:45,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967273579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:04:45,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:04:45,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-19 00:04:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200953282] [2022-03-19 00:04:45,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:04:45,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 00:04:45,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:04:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 00:04:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-19 00:04:45,820 INFO L87 Difference]: Start difference. First operand 3207 states and 5343 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 00:04:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:04:51,521 INFO L93 Difference]: Finished difference Result 5105 states and 8647 transitions. [2022-03-19 00:04:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 00:04:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 187 [2022-03-19 00:04:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:04:51,546 INFO L225 Difference]: With dead ends: 5105 [2022-03-19 00:04:51,546 INFO L226 Difference]: Without dead ends: 5101 [2022-03-19 00:04:51,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-19 00:04:51,562 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 00:04:51,562 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 237 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 00:04:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2022-03-19 00:04:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3213. [2022-03-19 00:04:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 1461 states have (on average 1.351813826146475) internal successors, (1975), 1485 states have internal predecessors, (1975), 1687 states have call successors, (1687), 66 states have call predecessors, (1687), 64 states have return successors, (1685), 1661 states have call predecessors, (1685), 1685 states have call successors, (1685) [2022-03-19 00:04:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 5347 transitions. [2022-03-19 00:04:54,999 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 5347 transitions. Word has length 187 [2022-03-19 00:04:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:04:54,999 INFO L478 AbstractCegarLoop]: Abstraction has 3213 states and 5347 transitions. [2022-03-19 00:04:54,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 00:04:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 5347 transitions. [2022-03-19 00:04:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-19 00:04:55,005 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:04:55,005 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:04:55,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 00:04:55,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 00:04:55,228 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:04:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:04:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash 147951836, now seen corresponding path program 6 times [2022-03-19 00:04:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:04:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627268583] [2022-03-19 00:04:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:04:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:04:55,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:04:55,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495413424] [2022-03-19 00:04:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 00:04:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:04:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:04:55,251 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:04:55,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 00:04:55,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 00:04:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:04:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 00:04:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:05:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 171 proven. 184 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-03-19 00:05:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:05:31,755 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:05:36,467 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:05:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:05:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627268583] [2022-03-19 00:05:43,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:05:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495413424] [2022-03-19 00:05:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495413424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 00:05:43,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:05:43,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-19 00:05:43,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276635873] [2022-03-19 00:05:43,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 00:05:43,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 00:05:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:05:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 00:05:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1404, Unknown=8, NotChecked=0, Total=1640 [2022-03-19 00:05:43,726 INFO L87 Difference]: Start difference. First operand 3213 states and 5347 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-19 00:05:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:05:58,674 INFO L93 Difference]: Finished difference Result 4277 states and 7137 transitions. [2022-03-19 00:05:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 00:05:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 204 [2022-03-19 00:05:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:05:58,684 INFO L225 Difference]: With dead ends: 4277 [2022-03-19 00:05:58,684 INFO L226 Difference]: Without dead ends: 3687 [2022-03-19 00:05:58,686 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=456, Invalid=2958, Unknown=8, NotChecked=0, Total=3422 [2022-03-19 00:05:58,686 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 89 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 00:05:58,687 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 638 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1248 Invalid, 0 Unknown, 21 Unchecked, 2.5s Time] [2022-03-19 00:05:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2022-03-19 00:06:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3112. [2022-03-19 00:06:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 1421 states have (on average 1.3462350457424348) internal successors, (1913), 1442 states have internal predecessors, (1913), 1629 states have call successors, (1629), 63 states have call predecessors, (1629), 61 states have return successors, (1627), 1606 states have call predecessors, (1627), 1627 states have call successors, (1627) [2022-03-19 00:06:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 5169 transitions. [2022-03-19 00:06:01,157 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 5169 transitions. Word has length 204 [2022-03-19 00:06:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:06:01,158 INFO L478 AbstractCegarLoop]: Abstraction has 3112 states and 5169 transitions. [2022-03-19 00:06:01,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-19 00:06:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 5169 transitions. [2022-03-19 00:06:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-19 00:06:01,162 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:06:01,162 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:06:01,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 00:06:01,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 00:06:01,379 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:06:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:06:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1467848016, now seen corresponding path program 7 times [2022-03-19 00:06:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:06:01,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403604993] [2022-03-19 00:06:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:06:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:06:01,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:06:01,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269668950] [2022-03-19 00:06:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 00:06:01,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:06:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:06:01,389 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:06:01,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 00:06:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:06:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 00:06:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:06:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 535 proven. 80 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-03-19 00:06:02,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:06:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:06:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403604993] [2022-03-19 00:06:03,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:06:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269668950] [2022-03-19 00:06:03,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269668950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 00:06:03,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:06:03,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 00:06:03,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100663597] [2022-03-19 00:06:03,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 00:06:03,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 00:06:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:06:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 00:06:03,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-19 00:06:03,063 INFO L87 Difference]: Start difference. First operand 3112 states and 5169 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-19 00:06:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:06:07,714 INFO L93 Difference]: Finished difference Result 3868 states and 6342 transitions. [2022-03-19 00:06:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 00:06:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 212 [2022-03-19 00:06:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:06:07,723 INFO L225 Difference]: With dead ends: 3868 [2022-03-19 00:06:07,723 INFO L226 Difference]: Without dead ends: 3178 [2022-03-19 00:06:07,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=646, Invalid=2776, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 00:06:07,727 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 109 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 00:06:07,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 946 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 00:06:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2022-03-19 00:06:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 3015. [2022-03-19 00:06:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 1388 states have (on average 1.3364553314121037) internal successors, (1855), 1409 states have internal predecessors, (1855), 1565 states have call successors, (1565), 63 states have call predecessors, (1565), 61 states have return successors, (1563), 1542 states have call predecessors, (1563), 1563 states have call successors, (1563) [2022-03-19 00:06:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4983 transitions. [2022-03-19 00:06:10,162 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4983 transitions. Word has length 212 [2022-03-19 00:06:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:06:10,162 INFO L478 AbstractCegarLoop]: Abstraction has 3015 states and 4983 transitions. [2022-03-19 00:06:10,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-19 00:06:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4983 transitions. [2022-03-19 00:06:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-19 00:06:10,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:06:10,168 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 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] [2022-03-19 00:06:10,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 00:06:10,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 00:06:10,386 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:06:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:06:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash -178722746, now seen corresponding path program 8 times [2022-03-19 00:06:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:06:10,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910315283] [2022-03-19 00:06:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:06:10,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:06:10,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:06:10,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758515751] [2022-03-19 00:06:10,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 00:06:10,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:06:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:06:10,398 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:06:10,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 00:06:10,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 00:06:10,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:06:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 00:06:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:06:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 69 proven. 202 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-19 00:06:11,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:06:12,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:06:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910315283] [2022-03-19 00:06:12,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:06:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758515751] [2022-03-19 00:06:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758515751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 00:06:12,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:06:12,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 00:06:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808252196] [2022-03-19 00:06:12,911 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 00:06:12,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 00:06:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:06:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 00:06:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-19 00:06:12,912 INFO L87 Difference]: Start difference. First operand 3015 states and 4983 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2022-03-19 00:06:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:06:19,533 INFO L93 Difference]: Finished difference Result 4642 states and 7756 transitions. [2022-03-19 00:06:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 00:06:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) Word has length 229 [2022-03-19 00:06:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:06:19,545 INFO L225 Difference]: With dead ends: 4642 [2022-03-19 00:06:19,545 INFO L226 Difference]: Without dead ends: 4156 [2022-03-19 00:06:19,547 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 00:06:19,548 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 117 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 00:06:19,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1381 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 00:06:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2022-03-19 00:06:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3201. [2022-03-19 00:06:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 1478 states have (on average 1.3328822733423544) internal successors, (1970), 1499 states have internal predecessors, (1970), 1661 states have call successors, (1661), 63 states have call predecessors, (1661), 61 states have return successors, (1659), 1638 states have call predecessors, (1659), 1659 states have call successors, (1659) [2022-03-19 00:06:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 5290 transitions. [2022-03-19 00:06:22,284 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 5290 transitions. Word has length 229 [2022-03-19 00:06:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:06:22,284 INFO L478 AbstractCegarLoop]: Abstraction has 3201 states and 5290 transitions. [2022-03-19 00:06:22,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2022-03-19 00:06:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 5290 transitions. [2022-03-19 00:06:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-19 00:06:22,290 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:06:22,290 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 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] [2022-03-19 00:06:22,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 00:06:22,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 00:06:22,501 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:06:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:06:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash -139286510, now seen corresponding path program 9 times [2022-03-19 00:06:22,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:06:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218327554] [2022-03-19 00:06:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:06:22,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:06:22,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:06:22,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446443326] [2022-03-19 00:06:22,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:06:22,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:06:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:06:22,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:06:22,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 00:06:22,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 00:06:22,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:06:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 00:06:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:06:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 125 proven. 122 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2022-03-19 00:06:23,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:06:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 66 proven. 181 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2022-03-19 00:06:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:06:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218327554] [2022-03-19 00:06:24,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:06:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446443326] [2022-03-19 00:06:24,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446443326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:06:24,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:06:24,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2022-03-19 00:06:24,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940786885] [2022-03-19 00:06:24,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:06:24,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 00:06:24,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:06:24,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 00:06:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 00:06:24,746 INFO L87 Difference]: Start difference. First operand 3201 states and 5290 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 13 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-03-19 00:06:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:06:47,458 INFO L93 Difference]: Finished difference Result 5655 states and 9520 transitions. [2022-03-19 00:06:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-19 00:06:47,459 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 13 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 229 [2022-03-19 00:06:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:06:47,473 INFO L225 Difference]: With dead ends: 5655 [2022-03-19 00:06:47,473 INFO L226 Difference]: Without dead ends: 4688 [2022-03-19 00:06:47,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 423 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6743 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=4417, Invalid=17045, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 00:06:47,486 INFO L912 BasicCegarLoop]: 223 mSDtfsCounter, 232 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 3629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-19 00:06:47,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 2082 Invalid, 3629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1204 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-19 00:06:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4688 states. [2022-03-19 00:06:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4688 to 4146. [2022-03-19 00:06:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 1898 states have (on average 1.3245521601685986) internal successors, (2514), 1922 states have internal predecessors, (2514), 2186 states have call successors, (2186), 63 states have call predecessors, (2186), 61 states have return successors, (2184), 2160 states have call predecessors, (2184), 2184 states have call successors, (2184) [2022-03-19 00:06:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 6884 transitions. [2022-03-19 00:06:51,486 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 6884 transitions. Word has length 229 [2022-03-19 00:06:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:06:51,487 INFO L478 AbstractCegarLoop]: Abstraction has 4146 states and 6884 transitions. [2022-03-19 00:06:51,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 13 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-03-19 00:06:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 6884 transitions. [2022-03-19 00:06:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-19 00:06:51,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:06:51,492 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 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] [2022-03-19 00:06:51,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 00:06:51,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 00:06:51,710 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:06:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:06:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash 612112568, now seen corresponding path program 10 times [2022-03-19 00:06:51,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:06:51,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337913668] [2022-03-19 00:06:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:06:51,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:06:51,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:06:51,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807391707] [2022-03-19 00:06:51,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 00:06:51,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:06:51,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:06:51,736 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:06:51,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 00:06:51,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 00:06:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:06:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 00:06:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:06:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 77 proven. 200 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-19 00:06:53,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:06:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 81 proven. 196 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-19 00:06:55,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:06:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337913668] [2022-03-19 00:06:55,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:06:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807391707] [2022-03-19 00:06:55,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807391707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:06:55,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:06:55,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-03-19 00:06:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939062869] [2022-03-19 00:06:55,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:06:55,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 00:06:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:06:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 00:06:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 00:06:55,622 INFO L87 Difference]: Start difference. First operand 4146 states and 6884 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 35 states have internal predecessors, (95), 20 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 19 states have call predecessors, (72), 19 states have call successors, (72) [2022-03-19 00:07:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:07:14,430 INFO L93 Difference]: Finished difference Result 7738 states and 13039 transitions. [2022-03-19 00:07:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 00:07:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 35 states have internal predecessors, (95), 20 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 19 states have call predecessors, (72), 19 states have call successors, (72) Word has length 231 [2022-03-19 00:07:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:07:14,454 INFO L225 Difference]: With dead ends: 7738 [2022-03-19 00:07:14,454 INFO L226 Difference]: Without dead ends: 7223 [2022-03-19 00:07:14,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2224, Invalid=7088, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 00:07:14,459 INFO L912 BasicCegarLoop]: 202 mSDtfsCounter, 180 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 1233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1233 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-19 00:07:14,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1820 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1233 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-19 00:07:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7223 states. [2022-03-19 00:07:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7223 to 5904. [2022-03-19 00:07:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5904 states, 2614 states have (on average 1.3316755929609794) internal successors, (3481), 2639 states have internal predecessors, (3481), 3228 states have call successors, (3228), 63 states have call predecessors, (3228), 61 states have return successors, (3226), 3201 states have call predecessors, (3226), 3226 states have call successors, (3226) [2022-03-19 00:07:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5904 states to 5904 states and 9935 transitions. [2022-03-19 00:07:20,976 INFO L78 Accepts]: Start accepts. Automaton has 5904 states and 9935 transitions. Word has length 231 [2022-03-19 00:07:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:07:20,976 INFO L478 AbstractCegarLoop]: Abstraction has 5904 states and 9935 transitions. [2022-03-19 00:07:20,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 35 states have internal predecessors, (95), 20 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 19 states have call predecessors, (72), 19 states have call successors, (72) [2022-03-19 00:07:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5904 states and 9935 transitions. [2022-03-19 00:07:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-19 00:07:20,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:07:20,985 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 4, 4, 4, 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] [2022-03-19 00:07:21,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 00:07:21,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:07:21,187 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:07:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:07:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1353755715, now seen corresponding path program 11 times [2022-03-19 00:07:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:07:21,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570646192] [2022-03-19 00:07:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:07:21,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:07:21,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:07:21,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366692232] [2022-03-19 00:07:21,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 00:07:21,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:07:21,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:07:21,200 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:07:21,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 00:07:21,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-19 00:07:21,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:07:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 00:07:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates...