/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/cohencu-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:40:49,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:40:49,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:40:49,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:40:49,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:40:49,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:40:49,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:40:49,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:40:49,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:40:49,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:40:49,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:40:49,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:40:49,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:40:49,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:40:49,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:40:49,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:40:49,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:40:49,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:40:49,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:40:49,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:40:49,869 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:40:49,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:40:49,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:40:49,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:40:49,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:40:49,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 20:40:49,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 20:40:49,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 20:40:49,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 20:40:49,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 20:40:49,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 20:40:49,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:40:49,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:40:49,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:40:49,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:40:49,912 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:40:49,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:40:49,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:40:49,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:40:49,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:40:49,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:40:49,914 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:40:49,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:40:49,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:40:49,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:40:49,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:40:49,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:40:49,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:40:49,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:40:49,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:40:49,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:40:49,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:40:49,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:40:49,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:40:49,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:40:49,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:40:49,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:40:49,918 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:40:49,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:40:50,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:40:50,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:40:50,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:40:50,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:40:50,154 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:40:50,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2022-03-17 20:40:50,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b3a532f/f5deb4adc5b742bc9375aefbdf218246/FLAG1512cb622 [2022-03-17 20:40:50,563 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:40:50,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2022-03-17 20:40:50,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b3a532f/f5deb4adc5b742bc9375aefbdf218246/FLAG1512cb622 [2022-03-17 20:40:50,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b3a532f/f5deb4adc5b742bc9375aefbdf218246 [2022-03-17 20:40:50,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:40:50,997 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:40:50,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:40:51,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:40:51,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:40:51,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:40:50" (1/1) ... [2022-03-17 20:40:51,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417dc749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51, skipping insertion in model container [2022-03-17 20:40:51,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:40:50" (1/1) ... [2022-03-17 20:40:51,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:40:51,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:40:51,135 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/cohencu-ll_unwindbound2.c[588,601] [2022-03-17 20:40:51,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:40:51,170 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:40:51,185 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/cohencu-ll_unwindbound2.c[588,601] [2022-03-17 20:40:51,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:40:51,208 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:40:51,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51 WrapperNode [2022-03-17 20:40:51,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:40:51,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:40:51,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:40:51,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:40:51,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:40:51,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:40:51,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:40:51,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:40:51,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:40:51,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:51,288 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) [2022-03-17 20:40:51,295 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 [2022-03-17 20:40:51,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:40:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:40:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:40:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:40:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:40:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:40:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:40:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:40:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:40:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:40:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-17 20:40:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:40:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:40:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:40:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:40:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:40:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:40:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:40:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:40:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:40:51,376 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:40:51,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:40:51,543 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:40:51,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:40:51,560 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 20:40:51,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:40:51 BoogieIcfgContainer [2022-03-17 20:40:51,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:40:51,562 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:40:51,563 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:40:51,563 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:40:51,566 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:40:51" (1/1) ... [2022-03-17 20:40:51,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:40:51 BasicIcfg [2022-03-17 20:40:51,585 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:40:51,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:40:51,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:40:51,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:40:51,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:40:50" (1/4) ... [2022-03-17 20:40:51,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de0f2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:40:51, skipping insertion in model container [2022-03-17 20:40:51,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:40:51" (2/4) ... [2022-03-17 20:40:51,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de0f2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:40:51, skipping insertion in model container [2022-03-17 20:40:51,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:40:51" (3/4) ... [2022-03-17 20:40:51,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de0f2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:40:51, skipping insertion in model container [2022-03-17 20:40:51,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:40:51" (4/4) ... [2022-03-17 20:40:51,591 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound2.cqvasr [2022-03-17 20:40:51,595 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:40:51,596 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:40:51,627 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:40:51,633 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 [2022-03-17 20:40:51,633 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:40:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 20:40:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 20:40:51,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:51,649 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:51,650 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:51,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2022-03-17 20:40:51,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76507190] [2022-03-17 20:40:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:51,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:51,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:40:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:40:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76507190] [2022-03-17 20:40:51,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76507190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:40:51,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:40:51,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:40:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15882166] [2022-03-17 20:40:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:40:51,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:40:51,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:51,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:40:51,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:40:51,828 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:40:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:51,909 INFO L93 Difference]: Finished difference Result 57 states and 95 transitions. [2022-03-17 20:40:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:40:51,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 20:40:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:51,917 INFO L225 Difference]: With dead ends: 57 [2022-03-17 20:40:51,917 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 20:40:51,920 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:40:51,922 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:51,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:40:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 20:40:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-17 20:40:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 20:40:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-03-17 20:40:51,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-03-17 20:40:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:51,957 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-03-17 20:40:51,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:40:51,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-03-17 20:40:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 20:40:51,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:51,958 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:51,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:40:51,958 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2022-03-17 20:40:51,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:51,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575969853] [2022-03-17 20:40:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:51,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:52,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:40:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:40:52,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:52,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575969853] [2022-03-17 20:40:52,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575969853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:40:52,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:40:52,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:40:52,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46485247] [2022-03-17 20:40:52,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:40:52,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:40:52,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:52,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:40:52,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:40:52,077 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:40:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:52,193 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-03-17 20:40:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:40:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 20:40:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:52,195 INFO L225 Difference]: With dead ends: 40 [2022-03-17 20:40:52,195 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 20:40:52,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:40:52,196 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:52,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:40:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 20:40:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-17 20:40:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 20:40:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-03-17 20:40:52,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-03-17 20:40:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:52,215 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-03-17 20:40:52,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:40:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-03-17 20:40:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 20:40:52,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:52,216 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:52,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:40:52,216 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:52,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2022-03-17 20:40:52,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:52,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947836973] [2022-03-17 20:40:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:52,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:52,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:40:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:40:52,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:52,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947836973] [2022-03-17 20:40:52,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947836973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:40:52,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:40:52,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:40:52,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389431047] [2022-03-17 20:40:52,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:40:52,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:40:52,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:40:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:40:52,386 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:40:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:52,533 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-03-17 20:40:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:40:52,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 20:40:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:52,537 INFO L225 Difference]: With dead ends: 34 [2022-03-17 20:40:52,537 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 20:40:52,538 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:40:52,544 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:52,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:40:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 20:40:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 20:40:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 20:40:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 20:40:52,555 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-17 20:40:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:52,556 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 20:40:52,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:40:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 20:40:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:40:52,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:52,557 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:52,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 20:40:52,557 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2022-03-17 20:40:52,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:52,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488238866] [2022-03-17 20:40:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:52,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:52,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:52,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602671162] [2022-03-17 20:40:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:52,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:52,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:52,579 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) [2022-03-17 20:40:52,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:40:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:40:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:40:52,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:40:52,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:52,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488238866] [2022-03-17 20:40:52,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:52,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602671162] [2022-03-17 20:40:52,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602671162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:40:52,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:40:52,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:40:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083937786] [2022-03-17 20:40:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:40:52,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:40:52,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:52,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:40:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:40:52,728 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:40:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:52,790 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2022-03-17 20:40:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:40:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-17 20:40:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:52,792 INFO L225 Difference]: With dead ends: 50 [2022-03-17 20:40:52,792 INFO L226 Difference]: Without dead ends: 48 [2022-03-17 20:40:52,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:40:52,793 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:52,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 159 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:40:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-17 20:40:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-03-17 20:40:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 20:40:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-03-17 20:40:52,802 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-03-17 20:40:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:52,803 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-03-17 20:40:52,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:40:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-03-17 20:40:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 20:40:52,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:52,804 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:52,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:53,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:53,012 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2022-03-17 20:40:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355582721] [2022-03-17 20:40:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:53,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333238023] [2022-03-17 20:40:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:53,023 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) [2022-03-17 20:40:53,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:40:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:40:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:40:53,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:40:53,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:53,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355582721] [2022-03-17 20:40:53,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333238023] [2022-03-17 20:40:53,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333238023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:40:53,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:40:53,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:40:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277000551] [2022-03-17 20:40:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:40:53,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:40:53,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:40:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:40:53,153 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:40:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:53,204 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-17 20:40:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:40:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 20:40:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:53,208 INFO L225 Difference]: With dead ends: 54 [2022-03-17 20:40:53,208 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 20:40:53,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:40:53,209 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:53,210 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 159 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:40:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 20:40:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-03-17 20:40:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 20:40:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-03-17 20:40:53,225 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-03-17 20:40:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:53,225 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-03-17 20:40:53,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:40:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-03-17 20:40:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 20:40:53,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:53,227 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:53,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:53,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:53,440 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2022-03-17 20:40:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754513491] [2022-03-17 20:40:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:53,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:53,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484683966] [2022-03-17 20:40:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:53,454 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) [2022-03-17 20:40:53,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:40:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:40:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 20:40:53,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:40:53,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:53,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754513491] [2022-03-17 20:40:53,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:53,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484683966] [2022-03-17 20:40:53,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484683966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:40:53,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:40:53,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:40:53,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997704093] [2022-03-17 20:40:53,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:40:53,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:40:53,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:40:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:40:53,596 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:40:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:53,647 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-03-17 20:40:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:40:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-17 20:40:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:53,648 INFO L225 Difference]: With dead ends: 62 [2022-03-17 20:40:53,648 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 20:40:53,649 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:40:53,649 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:53,650 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:40:53,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 20:40:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-17 20:40:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 20:40:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-17 20:40:53,656 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-03-17 20:40:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:53,657 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-17 20:40:53,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:40:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-17 20:40:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 20:40:53,658 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:53,658 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:53,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:53,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:53,872 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2022-03-17 20:40:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625162872] [2022-03-17 20:40:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:53,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:53,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173454281] [2022-03-17 20:40:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:53,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:53,883 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) [2022-03-17 20:40:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:40:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:40:53,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-17 20:40:54,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:40:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:40:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625162872] [2022-03-17 20:40:54,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173454281] [2022-03-17 20:40:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173454281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:40:54,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:40:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-17 20:40:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488840805] [2022-03-17 20:40:54,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:40:54,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:40:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:40:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:40:54,148 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 20:40:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:54,182 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-03-17 20:40:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:40:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 45 [2022-03-17 20:40:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:54,184 INFO L225 Difference]: With dead ends: 72 [2022-03-17 20:40:54,184 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 20:40:54,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:40:54,185 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:54,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:40:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 20:40:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-17 20:40:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 20:40:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-03-17 20:40:54,192 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2022-03-17 20:40:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:54,193 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-03-17 20:40:54,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 20:40:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-03-17 20:40:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 20:40:54,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:54,194 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:54,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:54,403 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2022-03-17 20:40:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786776258] [2022-03-17 20:40:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:54,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820861328] [2022-03-17 20:40:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:54,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:54,417 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) [2022-03-17 20:40:54,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:40:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 20:40:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:40:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:40:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:40:54,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786776258] [2022-03-17 20:40:54,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820861328] [2022-03-17 20:40:54,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820861328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:40:54,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:40:54,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 20:40:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891917464] [2022-03-17 20:40:54,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:40:54,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:40:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:54,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:40:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:40:54,751 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-17 20:40:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:55,034 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2022-03-17 20:40:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:40:55,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-03-17 20:40:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:55,036 INFO L225 Difference]: With dead ends: 78 [2022-03-17 20:40:55,036 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 20:40:55,036 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:40:55,037 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:55,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 168 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:40:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 20:40:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2022-03-17 20:40:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 20:40:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-03-17 20:40:55,048 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 45 [2022-03-17 20:40:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:55,048 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-03-17 20:40:55,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-17 20:40:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-03-17 20:40:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 20:40:55,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:55,049 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:55,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:55,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:55,264 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2022-03-17 20:40:55,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:55,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349084650] [2022-03-17 20:40:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:55,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:55,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311362508] [2022-03-17 20:40:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:40:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:55,276 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) [2022-03-17 20:40:55,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:40:55,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:40:55,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:40:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 20:40:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 20:40:55,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:40:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 20:40:55,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:55,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349084650] [2022-03-17 20:40:55,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:55,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311362508] [2022-03-17 20:40:55,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311362508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:40:55,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:40:55,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 20:40:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118224389] [2022-03-17 20:40:55,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:40:55,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:40:55,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:55,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:40:55,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:40:55,610 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 20:40:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:55,717 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-03-17 20:40:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:40:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 50 [2022-03-17 20:40:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:55,718 INFO L225 Difference]: With dead ends: 82 [2022-03-17 20:40:55,719 INFO L226 Difference]: Without dead ends: 80 [2022-03-17 20:40:55,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:40:55,719 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:55,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 278 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:40:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-17 20:40:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2022-03-17 20:40:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 41 states have internal predecessors, (42), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 20:40:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-03-17 20:40:55,732 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 50 [2022-03-17 20:40:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:55,732 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-03-17 20:40:55,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 20:40:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-03-17 20:40:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 20:40:55,733 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:55,733 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:55,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:55,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:55,956 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash -895540175, now seen corresponding path program 3 times [2022-03-17 20:40:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600510865] [2022-03-17 20:40:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:55,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:55,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458082460] [2022-03-17 20:40:55,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:40:55,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:55,966 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) [2022-03-17 20:40:55,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:40:56,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 20:40:56,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:40:56,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 20:40:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 20:40:56,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:40:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 20:40:56,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600510865] [2022-03-17 20:40:56,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458082460] [2022-03-17 20:40:56,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458082460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:40:56,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:40:56,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 20:40:56,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459169359] [2022-03-17 20:40:56,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:40:56,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:40:56,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:40:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:40:56,453 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-17 20:40:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:56,742 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-03-17 20:40:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:40:56,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 55 [2022-03-17 20:40:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:56,743 INFO L225 Difference]: With dead ends: 90 [2022-03-17 20:40:56,744 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 20:40:56,744 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:40:56,745 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:56,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 197 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:40:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 20:40:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-03-17 20:40:56,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 20:40:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-03-17 20:40:56,757 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 55 [2022-03-17 20:40:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:56,757 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-03-17 20:40:56,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-17 20:40:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-03-17 20:40:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-17 20:40:56,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:56,759 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:56,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 20:40:56,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:56,971 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2022-03-17 20:40:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:56,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213287961] [2022-03-17 20:40:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:56,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:56,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825504595] [2022-03-17 20:40:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:56,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:56,981 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) [2022-03-17 20:40:56,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:40:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:40:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 20:40:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:40:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 20:40:57,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:40:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 20:40:58,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:40:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213287961] [2022-03-17 20:40:58,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:40:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825504595] [2022-03-17 20:40:58,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825504595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:40:58,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:40:58,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 20:40:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362695745] [2022-03-17 20:40:58,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:40:58,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:40:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:40:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:40:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:40:58,096 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 20:40:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:40:58,361 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2022-03-17 20:40:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:40:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2022-03-17 20:40:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:40:58,363 INFO L225 Difference]: With dead ends: 109 [2022-03-17 20:40:58,363 INFO L226 Difference]: Without dead ends: 107 [2022-03-17 20:40:58,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:40:58,364 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:40:58,364 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 204 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:40:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-17 20:40:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-03-17 20:40:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 20:40:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-03-17 20:40:58,385 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 71 [2022-03-17 20:40:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:40:58,386 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-03-17 20:40:58,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 20:40:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-03-17 20:40:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-17 20:40:58,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:40:58,387 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:58,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 20:40:58,601 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,SelfDestructingSolverStorable10 [2022-03-17 20:40:58,602 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:40:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:40:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2022-03-17 20:40:58,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:40:58,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105280786] [2022-03-17 20:40:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:40:58,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:40:58,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:40:58,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398914964] [2022-03-17 20:40:58,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:40:58,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:40:58,613 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) [2022-03-17 20:40:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 20:40:58,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:40:58,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-17 20:40:58,668 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 20:40:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 20:40:58,745 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 20:40:58,745 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 20:40:58,746 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:40:58,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-17 20:40:58,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:40:58,950 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:40:58,953 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:40:58,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:40:58 BasicIcfg [2022-03-17 20:40:58,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:40:58,982 INFO L158 Benchmark]: Toolchain (without parser) took 7984.75ms. Allocated memory was 198.2MB in the beginning and 308.3MB in the end (delta: 110.1MB). Free memory was 140.5MB in the beginning and 170.3MB in the end (delta: -29.8MB). Peak memory consumption was 81.3MB. Max. memory is 8.0GB. [2022-03-17 20:40:58,982 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 156.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:40:58,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.06ms. Allocated memory was 198.2MB in the beginning and 308.3MB in the end (delta: 110.1MB). Free memory was 140.3MB in the beginning and 280.4MB in the end (delta: -140.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-17 20:40:58,982 INFO L158 Benchmark]: Boogie Preprocessor took 27.01ms. Allocated memory is still 308.3MB. Free memory was 280.4MB in the beginning and 278.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 20:40:58,983 INFO L158 Benchmark]: RCFGBuilder took 320.22ms. Allocated memory is still 308.3MB. Free memory was 278.8MB in the beginning and 266.7MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 20:40:58,983 INFO L158 Benchmark]: IcfgTransformer took 22.70ms. Allocated memory is still 308.3MB. Free memory was 266.7MB in the beginning and 265.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:40:58,983 INFO L158 Benchmark]: TraceAbstraction took 7394.67ms. Allocated memory is still 308.3MB. Free memory was 265.2MB in the beginning and 170.3MB in the end (delta: 94.9MB). Peak memory consumption was 95.4MB. Max. memory is 8.0GB. [2022-03-17 20:40:58,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 156.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.06ms. Allocated memory was 198.2MB in the beginning and 308.3MB in the end (delta: 110.1MB). Free memory was 140.3MB in the beginning and 280.4MB in the end (delta: -140.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.01ms. Allocated memory is still 308.3MB. Free memory was 280.4MB in the beginning and 278.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 320.22ms. Allocated memory is still 308.3MB. Free memory was 278.8MB in the beginning and 266.7MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.70ms. Allocated memory is still 308.3MB. Free memory was 266.7MB in the beginning and 265.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7394.67ms. Allocated memory is still 308.3MB. Free memory was 265.2MB in the beginning and 170.3MB in the end (delta: 94.9MB). Peak memory consumption was 95.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=5, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=2, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=2, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=2, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=2, counter=3, n=2, x=8, y=19, z=18] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.3s, OverallIterations: 12, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 144 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 91 mSDsluCounter, 1622 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1142 mSDsCounter, 179 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 666 IncrementalHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 179 mSolverCounterUnsat, 480 mSDtfsCounter, 666 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 626 GetRequests, 556 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=11, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 440 NumberOfCodeBlocks, 410 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 617 ConstructedInterpolants, 0 QuantifiedInterpolants, 2913 SizeOfPredicates, 12 NumberOfNonLiveVariables, 981 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 1252/1302 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-17 20:40:58,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...