/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:46:39,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:46:39,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:46:39,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:46:39,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:46:39,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:46:39,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:46:39,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:46:39,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:46:39,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:46:39,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:46:39,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:46:39,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:46:39,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:46:39,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:46:39,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:46:39,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:46:39,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:46:39,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:46:39,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:46:39,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:46:39,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:46:39,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:46:39,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:46:39,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:46:39,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:46:39,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:46:39,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:46:39,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:46:39,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:46:39,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:46:39,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:46:39,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:46:39,298 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:46:39,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:46:39,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:46:39,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:46:39,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:46:39,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:46:39,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:46:39,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:46:39,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:46:39,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:46:39,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:46:39,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:46:39,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:46:39,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:46:39,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:46:39,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:46:39,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:46:39,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:46:39,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:46:39,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:46:39,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:46:39,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:46:39,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:46:39,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:46:39,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:46:39,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:46:39,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:46:39,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:46:39,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:46:39,800 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:46:39,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 16:46:39,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b2317ad/01571366ed9348efa8441980941bfca9/FLAGdf1d24a1d [2021-02-21 16:46:40,791 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:46:40,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 16:46:40,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b2317ad/01571366ed9348efa8441980941bfca9/FLAGdf1d24a1d [2021-02-21 16:46:40,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b2317ad/01571366ed9348efa8441980941bfca9 [2021-02-21 16:46:40,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:46:40,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:46:40,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:46:40,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:46:40,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:46:40,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:46:40" (1/1) ... [2021-02-21 16:46:40,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f81970a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:40, skipping insertion in model container [2021-02-21 16:46:40,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:46:40" (1/1) ... [2021-02-21 16:46:40,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:46:41,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:46:41,819 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34132,34145] [2021-02-21 16:46:42,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:46:42,040 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:46:42,446 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34132,34145] [2021-02-21 16:46:42,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:46:42,634 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:46:42,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42 WrapperNode [2021-02-21 16:46:42,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:46:42,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:46:42,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:46:42,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:46:42,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... [2021-02-21 16:46:42,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:46:42,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:46:42,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:46:42,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:46:42,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:46:42,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:46:42,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:46:42,924 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:46:42,924 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:46:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:46:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:46:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:46:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:46:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:46:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 16:46:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-21 16:46:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 16:46:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 16:46:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:46:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 16:46:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 16:46:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 16:46:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 16:46:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 16:46:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-21 16:46:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 16:46:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 16:46:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:46:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:46:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:46:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:46:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:46:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:46:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:46:45,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:46:45,413 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:46:45,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:46:45 BoogieIcfgContainer [2021-02-21 16:46:45,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:46:45,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:46:45,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:46:45,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:46:45,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:46:40" (1/3) ... [2021-02-21 16:46:45,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14044d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:46:45, skipping insertion in model container [2021-02-21 16:46:45,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:46:42" (2/3) ... [2021-02-21 16:46:45,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14044d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:46:45, skipping insertion in model container [2021-02-21 16:46:45,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:46:45" (3/3) ... [2021-02-21 16:46:45,425 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 16:46:45,433 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:46:45,438 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:46:45,458 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:46:45,491 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:46:45,491 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:46:45,491 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:46:45,491 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:46:45,491 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:46:45,492 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:46:45,492 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:46:45,492 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:46:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2021-02-21 16:46:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:46:45,554 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:45,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:46:45,556 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash -796953542, now seen corresponding path program 1 times [2021-02-21 16:46:45,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:45,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867469912] [2021-02-21 16:46:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:46,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:46,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:46,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:46,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:46:46,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:46,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:47,188 WARN L202 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:46:47,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:47,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:47,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:47,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867469912] [2021-02-21 16:46:47,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:47,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:47,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677962871] [2021-02-21 16:46:47,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:47,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:47,562 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2021-02-21 16:46:48,105 WARN L202 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-21 16:46:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:53,069 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2021-02-21 16:46:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:46:53,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-21 16:46:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:53,099 INFO L225 Difference]: With dead ends: 1489 [2021-02-21 16:46:53,099 INFO L226 Difference]: Without dead ends: 1273 [2021-02-21 16:46:53,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:46:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-02-21 16:46:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2021-02-21 16:46:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2021-02-21 16:46:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2021-02-21 16:46:53,242 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2021-02-21 16:46:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:53,243 INFO L480 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2021-02-21 16:46:53,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2021-02-21 16:46:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:46:53,252 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:53,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:46:53,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:46:53,253 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash -7793704, now seen corresponding path program 1 times [2021-02-21 16:46:53,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:53,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785969670] [2021-02-21 16:46:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:53,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:53,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:53,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:53,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:46:53,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:53,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:54,149 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:46:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:54,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:54,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:46:54,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785969670] [2021-02-21 16:46:54,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:54,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:54,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27349396] [2021-02-21 16:46:54,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:54,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:54,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:54,406 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2021-02-21 16:46:54,911 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-21 16:46:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:59,107 INFO L93 Difference]: Finished difference Result 2519 states and 3949 transitions. [2021-02-21 16:46:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:46:59,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-21 16:46:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:59,122 INFO L225 Difference]: With dead ends: 2519 [2021-02-21 16:46:59,123 INFO L226 Difference]: Without dead ends: 2185 [2021-02-21 16:46:59,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:46:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-02-21 16:46:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-02-21 16:46:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2183 states. [2021-02-21 16:46:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3388 transitions. [2021-02-21 16:46:59,216 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3388 transitions. Word has length 326 [2021-02-21 16:46:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:59,217 INFO L480 AbstractCegarLoop]: Abstraction has 2183 states and 3388 transitions. [2021-02-21 16:46:59,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3388 transitions. [2021-02-21 16:46:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:46:59,227 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:59,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:46:59,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:46:59,228 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1152623527, now seen corresponding path program 1 times [2021-02-21 16:46:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:59,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204755052] [2021-02-21 16:46:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:59,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:59,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:59,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:59,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:46:59,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:59,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:46:59,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:59,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:00,409 WARN L202 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:00,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:00,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:00,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:00,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204755052] [2021-02-21 16:47:00,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:00,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:47:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350063134] [2021-02-21 16:47:00,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:47:00,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:47:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:47:00,668 INFO L87 Difference]: Start difference. First operand 2183 states and 3388 transitions. Second operand 5 states. [2021-02-21 16:47:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:07,647 INFO L93 Difference]: Finished difference Result 6462 states and 10021 transitions. [2021-02-21 16:47:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:47:07,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2021-02-21 16:47:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:07,674 INFO L225 Difference]: With dead ends: 6462 [2021-02-21 16:47:07,675 INFO L226 Difference]: Without dead ends: 4294 [2021-02-21 16:47:07,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-02-21 16:47:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2021-02-21 16:47:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2021-02-21 16:47:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 6626 transitions. [2021-02-21 16:47:07,875 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 6626 transitions. Word has length 326 [2021-02-21 16:47:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:07,875 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 6626 transitions. [2021-02-21 16:47:07,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:47:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 6626 transitions. [2021-02-21 16:47:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-21 16:47:07,886 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:07,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:07,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:47:07,888 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1729084787, now seen corresponding path program 1 times [2021-02-21 16:47:07,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:07,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677512097] [2021-02-21 16:47:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:07,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:07,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:07,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:07,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:47:08,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:08,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:08,486 WARN L202 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:08,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:08,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:08,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:08,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677512097] [2021-02-21 16:47:08,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:08,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:47:08,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141265825] [2021-02-21 16:47:08,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:47:08,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:47:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:08,652 INFO L87 Difference]: Start difference. First operand 4292 states and 6626 transitions. Second operand 4 states. [2021-02-21 16:47:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:16,186 INFO L93 Difference]: Finished difference Result 12831 states and 19807 transitions. [2021-02-21 16:47:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:47:16,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-21 16:47:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:16,229 INFO L225 Difference]: With dead ends: 12831 [2021-02-21 16:47:16,229 INFO L226 Difference]: Without dead ends: 8564 [2021-02-21 16:47:16,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2021-02-21 16:47:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 4305. [2021-02-21 16:47:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4305 states. [2021-02-21 16:47:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 6645 transitions. [2021-02-21 16:47:16,481 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 6645 transitions. Word has length 328 [2021-02-21 16:47:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:16,481 INFO L480 AbstractCegarLoop]: Abstraction has 4305 states and 6645 transitions. [2021-02-21 16:47:16,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:47:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 6645 transitions. [2021-02-21 16:47:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-21 16:47:16,493 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:16,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:16,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:47:16,494 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:16,495 INFO L82 PathProgramCache]: Analyzing trace with hash 4113480, now seen corresponding path program 1 times [2021-02-21 16:47:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:16,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957020236] [2021-02-21 16:47:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:16,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:16,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:16,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:16,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:47:16,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:16,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:17,220 WARN L202 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:17,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:17,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:17,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:17,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957020236] [2021-02-21 16:47:17,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:17,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:47:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49583963] [2021-02-21 16:47:17,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:47:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:47:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:17,429 INFO L87 Difference]: Start difference. First operand 4305 states and 6645 transitions. Second operand 4 states. [2021-02-21 16:47:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:24,973 INFO L93 Difference]: Finished difference Result 12594 states and 19394 transitions. [2021-02-21 16:47:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:47:24,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-21 16:47:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:25,030 INFO L225 Difference]: With dead ends: 12594 [2021-02-21 16:47:25,030 INFO L226 Difference]: Without dead ends: 8431 [2021-02-21 16:47:25,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2021-02-21 16:47:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 8429. [2021-02-21 16:47:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8429 states. [2021-02-21 16:47:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 12935 transitions. [2021-02-21 16:47:25,456 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 12935 transitions. Word has length 328 [2021-02-21 16:47:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:25,457 INFO L480 AbstractCegarLoop]: Abstraction has 8429 states and 12935 transitions. [2021-02-21 16:47:25,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:47:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 12935 transitions. [2021-02-21 16:47:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-02-21 16:47:25,482 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:25,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:25,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:47:25,483 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:25,484 INFO L82 PathProgramCache]: Analyzing trace with hash -649310729, now seen corresponding path program 1 times [2021-02-21 16:47:25,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:25,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610368468] [2021-02-21 16:47:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:25,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:25,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:25,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:25,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:47:25,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:25,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:26,170 WARN L202 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:26,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:26,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:26,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:26,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610368468] [2021-02-21 16:47:26,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:26,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:47:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371212688] [2021-02-21 16:47:26,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:47:26,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:47:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:26,289 INFO L87 Difference]: Start difference. First operand 8429 states and 12935 transitions. Second operand 4 states. [2021-02-21 16:47:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:34,236 INFO L93 Difference]: Finished difference Result 25174 states and 38618 transitions. [2021-02-21 16:47:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:47:34,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2021-02-21 16:47:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:34,281 INFO L225 Difference]: With dead ends: 25174 [2021-02-21 16:47:34,281 INFO L226 Difference]: Without dead ends: 16805 [2021-02-21 16:47:34,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2021-02-21 16:47:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 8447. [2021-02-21 16:47:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8447 states. [2021-02-21 16:47:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 12956 transitions. [2021-02-21 16:47:34,874 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 12956 transitions. Word has length 329 [2021-02-21 16:47:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:34,874 INFO L480 AbstractCegarLoop]: Abstraction has 8447 states and 12956 transitions. [2021-02-21 16:47:34,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:47:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 12956 transitions. [2021-02-21 16:47:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-21 16:47:34,896 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:34,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:34,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:47:34,896 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:34,897 INFO L82 PathProgramCache]: Analyzing trace with hash -448342333, now seen corresponding path program 1 times [2021-02-21 16:47:34,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:34,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442413749] [2021-02-21 16:47:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:35,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:35,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:35,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:35,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:47:35,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:35,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:35,574 WARN L202 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:35,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:35,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:35,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442413749] [2021-02-21 16:47:35,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:35,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:47:35,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123833252] [2021-02-21 16:47:35,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:47:35,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:47:35,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:35,755 INFO L87 Difference]: Start difference. First operand 8447 states and 12956 transitions. Second operand 4 states. [2021-02-21 16:47:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:43,738 INFO L93 Difference]: Finished difference Result 24662 states and 37725 transitions. [2021-02-21 16:47:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:47:43,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2021-02-21 16:47:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:43,777 INFO L225 Difference]: With dead ends: 24662 [2021-02-21 16:47:43,777 INFO L226 Difference]: Without dead ends: 16460 [2021-02-21 16:47:43,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16460 states. [2021-02-21 16:47:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16460 to 16458. [2021-02-21 16:47:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16458 states. [2021-02-21 16:47:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16458 states to 16458 states and 25068 transitions. [2021-02-21 16:47:44,648 INFO L78 Accepts]: Start accepts. Automaton has 16458 states and 25068 transitions. Word has length 330 [2021-02-21 16:47:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:44,649 INFO L480 AbstractCegarLoop]: Abstraction has 16458 states and 25068 transitions. [2021-02-21 16:47:44,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:47:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 16458 states and 25068 transitions. [2021-02-21 16:47:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-21 16:47:44,678 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:44,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:44,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:47:44,679 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash -29605280, now seen corresponding path program 1 times [2021-02-21 16:47:44,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:44,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364253633] [2021-02-21 16:47:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:45,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:45,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:45,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:45,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:47:45,092 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:47:45,096 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:47:45,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:45,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:47:45,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:45,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:45,559 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:45,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:45,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:45,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364253633] [2021-02-21 16:47:45,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:45,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:47:45,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165185768] [2021-02-21 16:47:45,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:47:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:47:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:45,901 INFO L87 Difference]: Start difference. First operand 16458 states and 25068 transitions. Second operand 6 states. [2021-02-21 16:47:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:53,393 INFO L93 Difference]: Finished difference Result 48572 states and 73861 transitions. [2021-02-21 16:47:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:47:53,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2021-02-21 16:47:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:53,464 INFO L225 Difference]: With dead ends: 48572 [2021-02-21 16:47:53,464 INFO L226 Difference]: Without dead ends: 32173 [2021-02-21 16:47:53,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32173 states. [2021-02-21 16:47:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32173 to 32171. [2021-02-21 16:47:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32171 states. [2021-02-21 16:47:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32171 states to 32171 states and 48661 transitions. [2021-02-21 16:47:54,977 INFO L78 Accepts]: Start accepts. Automaton has 32171 states and 48661 transitions. Word has length 330 [2021-02-21 16:47:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:54,978 INFO L480 AbstractCegarLoop]: Abstraction has 32171 states and 48661 transitions. [2021-02-21 16:47:54,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:47:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 32171 states and 48661 transitions. [2021-02-21 16:47:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-21 16:47:55,028 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:55,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:55,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:47:55,029 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1987076995, now seen corresponding path program 1 times [2021-02-21 16:47:55,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:55,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305714560] [2021-02-21 16:47:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:55,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:55,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:55,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:55,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:47:55,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:55,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:55,854 WARN L202 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:47:55,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:55,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:55,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:47:56,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305714560] [2021-02-21 16:47:56,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:56,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:47:56,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846850210] [2021-02-21 16:47:56,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:47:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:47:56,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:56,057 INFO L87 Difference]: Start difference. First operand 32171 states and 48661 transitions. Second operand 4 states. [2021-02-21 16:48:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:06,141 INFO L93 Difference]: Finished difference Result 94573 states and 142734 transitions. [2021-02-21 16:48:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:48:06,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2021-02-21 16:48:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:06,251 INFO L225 Difference]: With dead ends: 94573 [2021-02-21 16:48:06,251 INFO L226 Difference]: Without dead ends: 62923 [2021-02-21 16:48:06,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:48:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62923 states. [2021-02-21 16:48:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62923 to 62921. [2021-02-21 16:48:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62921 states. [2021-02-21 16:48:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62921 states to 62921 states and 94494 transitions. [2021-02-21 16:48:09,495 INFO L78 Accepts]: Start accepts. Automaton has 62921 states and 94494 transitions. Word has length 332 [2021-02-21 16:48:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:09,496 INFO L480 AbstractCegarLoop]: Abstraction has 62921 states and 94494 transitions. [2021-02-21 16:48:09,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:48:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 62921 states and 94494 transitions. [2021-02-21 16:48:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-21 16:48:09,551 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:09,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:48:09,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:48:09,552 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:09,552 INFO L82 PathProgramCache]: Analyzing trace with hash -181056678, now seen corresponding path program 1 times [2021-02-21 16:48:09,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:09,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821575305] [2021-02-21 16:48:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:10,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:10,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:10,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:10,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:48:10,229 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 16:48:10,230 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 16:48:10,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:10,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:48:10,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:10,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:10,756 WARN L202 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:48:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:10,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:10,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:10,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821575305] [2021-02-21 16:48:10,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:10,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:48:10,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329998956] [2021-02-21 16:48:10,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:48:10,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:48:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:48:10,925 INFO L87 Difference]: Start difference. First operand 62921 states and 94494 transitions. Second operand 6 states. [2021-02-21 16:48:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:22,571 INFO L93 Difference]: Finished difference Result 186176 states and 279088 transitions. [2021-02-21 16:48:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:22,572 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 332 [2021-02-21 16:48:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:22,839 INFO L225 Difference]: With dead ends: 186176 [2021-02-21 16:48:22,839 INFO L226 Difference]: Without dead ends: 123410 [2021-02-21 16:48:22,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:48:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123410 states. [2021-02-21 16:48:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123410 to 123408. [2021-02-21 16:48:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123408 states. [2021-02-21 16:48:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123408 states to 123408 states and 183988 transitions. [2021-02-21 16:48:28,932 INFO L78 Accepts]: Start accepts. Automaton has 123408 states and 183988 transitions. Word has length 332 [2021-02-21 16:48:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:28,932 INFO L480 AbstractCegarLoop]: Abstraction has 123408 states and 183988 transitions. [2021-02-21 16:48:28,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:48:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 123408 states and 183988 transitions. [2021-02-21 16:48:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-21 16:48:29,055 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:29,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:48:29,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:48:29,056 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -989792084, now seen corresponding path program 1 times [2021-02-21 16:48:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:29,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384180547] [2021-02-21 16:48:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:29,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:29,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:29,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:29,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:48:29,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:29,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:48:29,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:29,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:30,511 WARN L202 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:48:30,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:30,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:30,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:30,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384180547] [2021-02-21 16:48:30,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:30,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:48:30,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892359436] [2021-02-21 16:48:30,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:48:30,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:48:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:30,677 INFO L87 Difference]: Start difference. First operand 123408 states and 183988 transitions. Second operand 5 states. [2021-02-21 16:48:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:47,582 INFO L93 Difference]: Finished difference Result 364427 states and 542281 transitions. [2021-02-21 16:48:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:47,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2021-02-21 16:48:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:48,212 INFO L225 Difference]: With dead ends: 364427 [2021-02-21 16:48:48,213 INFO L226 Difference]: Without dead ends: 241305 [2021-02-21 16:48:48,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:48:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241305 states. [2021-02-21 16:49:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241305 to 241303. [2021-02-21 16:49:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241303 states. [2021-02-21 16:49:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241303 states to 241303 states and 356836 transitions. [2021-02-21 16:49:01,055 INFO L78 Accepts]: Start accepts. Automaton has 241303 states and 356836 transitions. Word has length 332 [2021-02-21 16:49:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:01,056 INFO L480 AbstractCegarLoop]: Abstraction has 241303 states and 356836 transitions. [2021-02-21 16:49:01,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:49:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 241303 states and 356836 transitions. [2021-02-21 16:49:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-21 16:49:01,248 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:01,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:49:01,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:49:01,249 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1009981714, now seen corresponding path program 1 times [2021-02-21 16:49:01,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:01,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78366505] [2021-02-21 16:49:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:01,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:01,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:01,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:01,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:49:01,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:01,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:02,590 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:49:02,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:02,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:02,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:49:02,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78366505] [2021-02-21 16:49:02,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:02,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:49:02,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867835674] [2021-02-21 16:49:02,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:49:02,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:49:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:02,963 INFO L87 Difference]: Start difference. First operand 241303 states and 356836 transitions. Second operand 4 states. [2021-02-21 16:49:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:30,847 INFO L93 Difference]: Finished difference Result 710956 states and 1048776 transitions. [2021-02-21 16:49:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:49:30,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2021-02-21 16:49:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:31,871 INFO L225 Difference]: With dead ends: 710956 [2021-02-21 16:49:31,871 INFO L226 Difference]: Without dead ends: 472170 [2021-02-21 16:49:32,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472170 states. [2021-02-21 16:49:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472170 to 472168. [2021-02-21 16:49:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472168 states. [2021-02-21 16:49:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472168 states to 472168 states and 692502 transitions. [2021-02-21 16:49:58,245 INFO L78 Accepts]: Start accepts. Automaton has 472168 states and 692502 transitions. Word has length 334 [2021-02-21 16:49:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:58,246 INFO L480 AbstractCegarLoop]: Abstraction has 472168 states and 692502 transitions. [2021-02-21 16:49:58,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:49:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 472168 states and 692502 transitions. [2021-02-21 16:49:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-21 16:49:59,332 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:59,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:49:59,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:49:59,332 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash 509472535, now seen corresponding path program 1 times [2021-02-21 16:49:59,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:59,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356504992] [2021-02-21 16:49:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:59,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:59,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:59,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:59,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:49:59,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:59,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:59,947 WARN L202 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-21 16:49:59,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:59,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:59,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:00,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356504992] [2021-02-21 16:50:00,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:00,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:50:00,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817240879] [2021-02-21 16:50:00,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:50:00,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:50:00,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:50:00,205 INFO L87 Difference]: Start difference. First operand 472168 states and 692502 transitions. Second operand 4 states.