/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:30:47,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:30:47,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:30:47,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:30:47,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:30:47,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:30:47,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:30:47,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:30:47,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:30:47,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:30:47,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:30:47,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:30:47,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:30:47,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:30:47,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:30:47,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:30:47,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:30:47,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:30:47,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:30:47,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:30:47,180 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:30:47,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:30:47,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:30:47,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:30:47,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:30:47,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 10:30:47,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:30:47,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:30:47,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:30:47,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:30:47,215 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:30:47,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:30:47,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:30:47,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:30:47,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:30:47,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:30:47,218 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:30:47,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:30:47,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:30:47,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:30:47,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:30:47,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:30:47,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:30:47,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:30:47,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:30:47,221 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:30:47,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:30:47,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:30:47,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:30:47,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:30:47,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:30:47,407 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:30:47,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-20 10:30:47,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/325708861/1327eb248e3043a48e9d7af10858299a/FLAGf2b0ebde5 [2022-03-20 10:30:47,800 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:30:47,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-20 10:30:47,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/325708861/1327eb248e3043a48e9d7af10858299a/FLAGf2b0ebde5 [2022-03-20 10:30:48,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/325708861/1327eb248e3043a48e9d7af10858299a [2022-03-20 10:30:48,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:30:48,233 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:30:48,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:30:48,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:30:48,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:30:48,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc6d710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48, skipping insertion in model container [2022-03-20 10:30:48,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:30:48,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:30:48,396 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/fermat2-ll_unwindbound100.c[524,537] [2022-03-20 10:30:48,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:30:48,430 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:30:48,437 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/fermat2-ll_unwindbound100.c[524,537] [2022-03-20 10:30:48,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:30:48,449 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:30:48,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48 WrapperNode [2022-03-20 10:30:48,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:30:48,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:30:48,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:30:48,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:30:48,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:30:48,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:30:48,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:30:48,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:30:48,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:30:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:48,492 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) [2022-03-20 10:30:48,503 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 [2022-03-20 10:30:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:30:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:30:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:30:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:30:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:30:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:30:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:30:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:30:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:30:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:30:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:30:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:30:48,573 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:30:48,574 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:30:48,658 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:30:48,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:30:48,661 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 10:30:48,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:30:48 BoogieIcfgContainer [2022-03-20 10:30:48,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:30:48,663 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:30:48,663 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:30:48,664 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:30:48,666 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:30:48" (1/1) ... [2022-03-20 10:30:48,667 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:30:48,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:30:48 BasicIcfg [2022-03-20 10:30:48,677 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:30:48,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:30:48,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:30:48,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:30:48,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:30:48" (1/4) ... [2022-03-20 10:30:48,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6334b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:30:48, skipping insertion in model container [2022-03-20 10:30:48,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:30:48" (2/4) ... [2022-03-20 10:30:48,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6334b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:30:48, skipping insertion in model container [2022-03-20 10:30:48,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:30:48" (3/4) ... [2022-03-20 10:30:48,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6334b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:30:48, skipping insertion in model container [2022-03-20 10:30:48,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:30:48" (4/4) ... [2022-03-20 10:30:48,682 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.cqvasr [2022-03-20 10:30:48,685 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:30:48,685 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:30:48,712 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:30:48,731 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 [2022-03-20 10:30:48,732 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:30:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 10:30:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 10:30:48,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:48,758 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:48,759 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2022-03-20 10:30:48,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:48,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99081203] [2022-03-20 10:30:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:48,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:48,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:48,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151736802] [2022-03-20 10:30:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:48,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:48,834 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) [2022-03-20 10:30:48,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:30:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:30:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 10:30:48,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 10:30:49,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:30:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99081203] [2022-03-20 10:30:49,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151736802] [2022-03-20 10:30:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151736802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:30:49,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:30:49,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 10:30:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563863205] [2022-03-20 10:30:49,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:30:49,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 10:30:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 10:30:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 10:30:49,086 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:30:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:49,109 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 10:30:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 10:30:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 10:30:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:49,115 INFO L225 Difference]: With dead ends: 53 [2022-03-20 10:30:49,115 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 10:30:49,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 10:30:49,119 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:49,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:30:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 10:30:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 10:30:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 10:30:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-20 10:30:49,141 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-20 10:30:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:49,141 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-20 10:30:49,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:30:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-20 10:30:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:30:49,142 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:49,143 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:49,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:30:49,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 10:30:49,356 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2022-03-20 10:30:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:49,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315568527] [2022-03-20 10:30:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:49,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:49,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293181043] [2022-03-20 10:30:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:49,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:49,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:49,389 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) [2022-03-20 10:30:49,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:30:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:30:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:30:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:49,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:30:49,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315568527] [2022-03-20 10:30:49,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293181043] [2022-03-20 10:30:49,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293181043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:30:49,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:30:49,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:30:49,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650047632] [2022-03-20 10:30:49,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:30:49,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:30:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:30:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:30:49,545 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:30:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:49,555 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 10:30:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:30:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:30:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:49,556 INFO L225 Difference]: With dead ends: 34 [2022-03-20 10:30:49,556 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 10:30:49,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:30:49,557 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:49,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:30:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 10:30:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 10:30:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 10:30:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 10:30:49,561 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-20 10:30:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:49,562 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 10:30:49,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:30:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 10:30:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:30:49,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:49,563 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:49,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:30:49,772 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,SelfDestructingSolverStorable1 [2022-03-20 10:30:49,775 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2022-03-20 10:30:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:49,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323148211] [2022-03-20 10:30:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:49,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:49,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:49,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452848816] [2022-03-20 10:30:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:49,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:49,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:49,791 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) [2022-03-20 10:30:49,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:30:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:30:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:30:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:50,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:30:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323148211] [2022-03-20 10:30:50,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452848816] [2022-03-20 10:30:50,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452848816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:30:50,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:30:50,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:30:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704401299] [2022-03-20 10:30:50,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:30:50,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:30:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:30:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:30:50,164 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:30:52,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:30:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:52,237 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-20 10:30:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:30:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 10:30:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:52,239 INFO L225 Difference]: With dead ends: 37 [2022-03-20 10:30:52,239 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 10:30:52,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:30:52,240 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:52,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 10:30:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 10:30:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-20 10:30:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 10:30:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-20 10:30:52,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-20 10:30:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:52,246 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-20 10:30:52,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:30:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-20 10:30:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 10:30:52,247 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:52,247 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:52,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:30:52,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:52,464 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2022-03-20 10:30:52,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:52,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846000498] [2022-03-20 10:30:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:52,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:52,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552716722] [2022-03-20 10:30:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:52,475 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) [2022-03-20 10:30:52,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:30:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:30:52,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 10:30:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:52,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:30:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:52,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846000498] [2022-03-20 10:30:52,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552716722] [2022-03-20 10:30:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552716722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:30:52,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:30:52,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 10:30:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077177368] [2022-03-20 10:30:52,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:30:52,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:30:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:30:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:30:52,769 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:30:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:52,836 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-20 10:30:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:30:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-03-20 10:30:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:52,838 INFO L225 Difference]: With dead ends: 39 [2022-03-20 10:30:52,838 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 10:30:52,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:30:52,839 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:52,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:30:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 10:30:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-20 10:30:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 10:30:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-20 10:30:52,843 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-20 10:30:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:52,843 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-20 10:30:52,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:30:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-20 10:30:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 10:30:52,844 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:52,844 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:52,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:30:53,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:53,060 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2022-03-20 10:30:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:53,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977235740] [2022-03-20 10:30:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:53,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:53,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073424712] [2022-03-20 10:30:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:53,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:53,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:53,084 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) [2022-03-20 10:30:53,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:30:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:30:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:30:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:53,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:30:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:53,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:53,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977235740] [2022-03-20 10:30:53,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:53,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073424712] [2022-03-20 10:30:53,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073424712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:30:53,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:30:53,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 10:30:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437756970] [2022-03-20 10:30:53,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:30:53,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:30:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:30:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:30:53,256 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 10:30:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:53,321 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-03-20 10:30:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:30:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-03-20 10:30:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:53,322 INFO L225 Difference]: With dead ends: 61 [2022-03-20 10:30:53,322 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 10:30:53,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:30:53,323 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:53,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:30:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 10:30:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 10:30:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 10:30:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-20 10:30:53,330 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-03-20 10:30:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:53,330 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-20 10:30:53,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 10:30:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-20 10:30:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 10:30:53,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:53,331 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:53,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:30:53,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:53,549 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 2 times [2022-03-20 10:30:53,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:53,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48860485] [2022-03-20 10:30:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:53,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:53,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825253154] [2022-03-20 10:30:53,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:30:53,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:53,584 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) [2022-03-20 10:30:53,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:30:53,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:30:53,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:30:53,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:30:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:53,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:30:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:30:53,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48860485] [2022-03-20 10:30:53,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825253154] [2022-03-20 10:30:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825253154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:30:53,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:30:53,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 10:30:53,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718750184] [2022-03-20 10:30:53,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:30:53,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:30:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:30:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:30:53,994 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-20 10:30:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:54,145 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-03-20 10:30:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 10:30:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-03-20 10:30:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:54,155 INFO L225 Difference]: With dead ends: 115 [2022-03-20 10:30:54,155 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 10:30:54,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 10:30:54,158 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:54,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:30:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 10:30:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 10:30:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:30:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-20 10:30:54,188 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-03-20 10:30:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:54,188 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-20 10:30:54,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-20 10:30:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-20 10:30:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 10:30:54,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:54,191 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:54,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 10:30:54,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:54,392 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 3 times [2022-03-20 10:30:54,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:54,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816435092] [2022-03-20 10:30:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:54,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:54,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:54,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69063820] [2022-03-20 10:30:54,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:30:54,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:54,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:54,419 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) [2022-03-20 10:30:54,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:30:56,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 10:30:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:30:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 10:30:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:56,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:30:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 10:30:57,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816435092] [2022-03-20 10:30:57,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69063820] [2022-03-20 10:30:57,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69063820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:30:57,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:30:57,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 10:30:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706137468] [2022-03-20 10:30:57,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:30:57,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 10:30:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 10:30:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 10:30:57,158 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-20 10:30:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:30:57,497 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-03-20 10:30:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 10:30:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-03-20 10:30:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:30:57,499 INFO L225 Difference]: With dead ends: 223 [2022-03-20 10:30:57,499 INFO L226 Difference]: Without dead ends: 218 [2022-03-20 10:30:57,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 10:30:57,500 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:30:57,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 256 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:30:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-20 10:30:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-20 10:30:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 10:30:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-20 10:30:57,517 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-03-20 10:30:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:30:57,518 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-20 10:30:57,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-20 10:30:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-20 10:30:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-20 10:30:57,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:30:57,520 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:30:57,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:30:57,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:57,730 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:30:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:30:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash -698087944, now seen corresponding path program 4 times [2022-03-20 10:30:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:30:57,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172263842] [2022-03-20 10:30:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:30:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:30:57,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:30:57,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115220174] [2022-03-20 10:30:57,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:30:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:30:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:30:57,742 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) [2022-03-20 10:30:57,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:30:57,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:30:57,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:30:57,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 10:30:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:30:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:30:58,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:30:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-20 10:30:59,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:30:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172263842] [2022-03-20 10:30:59,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:30:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115220174] [2022-03-20 10:30:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115220174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:30:59,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:30:59,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 10:30:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339252768] [2022-03-20 10:30:59,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:30:59,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 10:30:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:30:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 10:30:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 10:30:59,081 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-20 10:31:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:31:00,161 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2022-03-20 10:31:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 10:31:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-03-20 10:31:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:31:00,164 INFO L225 Difference]: With dead ends: 439 [2022-03-20 10:31:00,164 INFO L226 Difference]: Without dead ends: 434 [2022-03-20 10:31:00,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 10:31:00,167 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 725 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 10:31:00,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 518 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 10:31:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-20 10:31:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-20 10:31:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 10:31:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-20 10:31:00,191 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-03-20 10:31:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:31:00,192 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-20 10:31:00,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-20 10:31:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-20 10:31:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-20 10:31:00,197 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:31:00,197 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:31:00,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:31:00,427 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,SelfDestructingSolverStorable7 [2022-03-20 10:31:00,428 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:31:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:31:00,429 INFO L85 PathProgramCache]: Analyzing trace with hash -619812232, now seen corresponding path program 5 times [2022-03-20 10:31:00,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:31:00,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474916486] [2022-03-20 10:31:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:31:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:31:00,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:31:00,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6860707] [2022-03-20 10:31:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 10:31:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:31:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:31:00,482 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) [2022-03-20 10:31:00,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:31:02,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-20 10:31:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:31:02,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 10:31:02,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:31:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:31:03,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:31:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-20 10:31:05,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:31:05,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474916486] [2022-03-20 10:31:05,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:31:05,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6860707] [2022-03-20 10:31:05,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6860707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:31:05,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:31:05,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-20 10:31:05,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482962935] [2022-03-20 10:31:05,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:31:05,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 10:31:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:31:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 10:31:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 10:31:05,850 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-03-20 10:31:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:31:09,724 INFO L93 Difference]: Finished difference Result 871 states and 1013 transitions. [2022-03-20 10:31:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-20 10:31:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-03-20 10:31:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:31:09,728 INFO L225 Difference]: With dead ends: 871 [2022-03-20 10:31:09,728 INFO L226 Difference]: Without dead ends: 866 [2022-03-20 10:31:09,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 10:31:09,734 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 1515 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 10:31:09,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 974 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 10:31:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-20 10:31:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-03-20 10:31:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-20 10:31:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-03-20 10:31:09,773 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-03-20 10:31:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:31:09,774 INFO L478 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-03-20 10:31:09,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-03-20 10:31:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-03-20 10:31:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-03-20 10:31:09,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:31:09,787 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:31:09,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 10:31:09,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:31:09,995 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:31:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:31:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash 151958392, now seen corresponding path program 6 times [2022-03-20 10:31:09,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:31:09,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884338486] [2022-03-20 10:31:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:31:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:31:10,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:31:10,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210914174] [2022-03-20 10:31:10,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 10:31:10,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:31:10,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:31:10,048 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) [2022-03-20 10:31:10,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process