/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:31:53,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:31:53,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:31:53,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:31:53,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:31:53,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:31:53,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:31:53,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:31:53,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:31:53,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:31:53,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:31:53,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:31:53,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:31:53,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:31:53,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:31:53,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:31:53,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:31:53,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:31:53,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:31:53,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:31:53,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:31:53,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:31:53,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:31:53,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:31:53,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:31:53,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:31:53,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:31:53,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:31:53,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:31:53,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:31:53,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:31:53,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:31:53,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:31:53,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:31:53,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:31:53,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:31:53,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:31:53,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:31:53,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:31:53,451 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:31:53,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:31:53,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:31:53,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:31:53,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:31:53,452 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:31:53,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:31:53,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:31:53,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:31:53,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:31:53,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:31:53,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:31:53,454 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:31:53,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:31:54,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:31:54,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:31:54,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:31:54,010 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:31:54,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2021-02-21 20:31:54,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2379eacf1/77d3e63cb3be4633b05baf09ebd8d91f/FLAGde62c9a31 [2021-02-21 20:31:54,771 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:31:54,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2021-02-21 20:31:54,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2379eacf1/77d3e63cb3be4633b05baf09ebd8d91f/FLAGde62c9a31 [2021-02-21 20:31:55,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2379eacf1/77d3e63cb3be4633b05baf09ebd8d91f [2021-02-21 20:31:55,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:31:55,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:31:55,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:31:55,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:31:55,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:31:55,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526430ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55, skipping insertion in model container [2021-02-21 20:31:55,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:31:55,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:31:55,386 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-21 20:31:55,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:31:55,419 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:31:55,486 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-21 20:31:55,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:31:55,520 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:31:55,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55 WrapperNode [2021-02-21 20:31:55,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:31:55,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:31:55,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:31:55,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:31:55,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (1/1) ... [2021-02-21 20:31:55,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:31:55,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:31:55,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:31:55,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:31:55,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (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 20:31:55,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:31:55,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:31:55,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:31:55,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:31:55,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:31:55,785 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:31:55,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:31:55,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:31:55,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:31:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:31:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:31:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:31:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:31:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:31:55,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:31:55,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:31:56,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:31:56,653 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 20:31:56,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:31:56 BoogieIcfgContainer [2021-02-21 20:31:56,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:31:56,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:31:56,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:31:56,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:31:56,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:31:55" (1/3) ... [2021-02-21 20:31:56,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684a515b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:31:56, skipping insertion in model container [2021-02-21 20:31:56,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:31:55" (2/3) ... [2021-02-21 20:31:56,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684a515b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:31:56, skipping insertion in model container [2021-02-21 20:31:56,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:31:56" (3/3) ... [2021-02-21 20:31:56,668 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-02-21 20:31:56,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:31:56,685 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:31:56,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:31:56,737 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:31:56,737 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:31:56,737 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:31:56,737 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:31:56,737 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:31:56,738 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:31:56,738 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:31:56,738 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:31:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2021-02-21 20:31:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-21 20:31:56,771 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:31:56,773 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] [2021-02-21 20:31:56,773 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:31:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:31:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash -898561761, now seen corresponding path program 1 times [2021-02-21 20:31:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:31:56,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976250924] [2021-02-21 20:31:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:31:56,887 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:31:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:57,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:57,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:57,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:57,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:31:57,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:57,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:57,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:31:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:57,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:57,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:57,212 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 20:31:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976250924] [2021-02-21 20:31:57,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:31:57,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:31:57,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114147125] [2021-02-21 20:31:57,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:31:57,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:31:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:31:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:31:57,254 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 4 states. [2021-02-21 20:31:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:31:57,826 INFO L93 Difference]: Finished difference Result 288 states and 393 transitions. [2021-02-21 20:31:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:31:57,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-21 20:31:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:31:57,845 INFO L225 Difference]: With dead ends: 288 [2021-02-21 20:31:57,845 INFO L226 Difference]: Without dead ends: 200 [2021-02-21 20:31:57,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:31:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-21 20:31:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-02-21 20:31:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-21 20:31:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-02-21 20:31:57,989 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 87 [2021-02-21 20:31:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:31:57,990 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-02-21 20:31:57,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:31:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-02-21 20:31:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-21 20:31:57,994 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:31:57,994 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] [2021-02-21 20:31:57,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:31:57,995 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:31:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:31:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1510688528, now seen corresponding path program 1 times [2021-02-21 20:31:57,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:31:57,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242873411] [2021-02-21 20:31:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:31:58,001 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:31:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:58,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:58,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:31:58,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:58,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:31:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:58,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:58,182 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 20:31:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242873411] [2021-02-21 20:31:58,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:31:58,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:31:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316286176] [2021-02-21 20:31:58,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:31:58,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:31:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:31:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:31:58,187 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 4 states. [2021-02-21 20:31:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:31:58,574 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2021-02-21 20:31:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:31:58,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-21 20:31:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:31:58,578 INFO L225 Difference]: With dead ends: 238 [2021-02-21 20:31:58,579 INFO L226 Difference]: Without dead ends: 236 [2021-02-21 20:31:58,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:31:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-21 20:31:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 198. [2021-02-21 20:31:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-21 20:31:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-02-21 20:31:58,630 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 88 [2021-02-21 20:31:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:31:58,631 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-02-21 20:31:58,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:31:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-02-21 20:31:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-21 20:31:58,635 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:31:58,635 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] [2021-02-21 20:31:58,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:31:58,636 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:31:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:31:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2085367227, now seen corresponding path program 1 times [2021-02-21 20:31:58,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:31:58,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106875388] [2021-02-21 20:31:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:31:58,647 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:31:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:58,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:58,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:31:58,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:58,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:31:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:58,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:58,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:58,820 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 20:31:58,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106875388] [2021-02-21 20:31:58,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:31:58,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:31:58,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096871714] [2021-02-21 20:31:58,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:31:58,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:31:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:31:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:31:58,824 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 4 states. [2021-02-21 20:31:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:31:59,214 INFO L93 Difference]: Finished difference Result 474 states and 655 transitions. [2021-02-21 20:31:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:31:59,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-21 20:31:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:31:59,218 INFO L225 Difference]: With dead ends: 474 [2021-02-21 20:31:59,218 INFO L226 Difference]: Without dead ends: 333 [2021-02-21 20:31:59,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:31:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-02-21 20:31:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-02-21 20:31:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-21 20:31:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2021-02-21 20:31:59,288 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 88 [2021-02-21 20:31:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:31:59,289 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2021-02-21 20:31:59,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:31:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2021-02-21 20:31:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-21 20:31:59,293 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:31:59,293 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] [2021-02-21 20:31:59,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:31:59,294 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:31:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:31:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash 348430457, now seen corresponding path program 1 times [2021-02-21 20:31:59,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:31:59,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244978487] [2021-02-21 20:31:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:31:59,298 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:31:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:59,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:59,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:31:59,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:59,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:31:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:59,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:59,387 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 20:31:59,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244978487] [2021-02-21 20:31:59,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:31:59,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:31:59,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029100169] [2021-02-21 20:31:59,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:31:59,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:31:59,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:31:59,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:31:59,391 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 4 states. [2021-02-21 20:31:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:31:59,743 INFO L93 Difference]: Finished difference Result 403 states and 554 transitions. [2021-02-21 20:31:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:31:59,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-21 20:31:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:31:59,748 INFO L225 Difference]: With dead ends: 403 [2021-02-21 20:31:59,748 INFO L226 Difference]: Without dead ends: 401 [2021-02-21 20:31:59,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:31:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-02-21 20:31:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 331. [2021-02-21 20:31:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-21 20:31:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2021-02-21 20:31:59,815 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 89 [2021-02-21 20:31:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:31:59,816 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2021-02-21 20:31:59,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:31:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2021-02-21 20:31:59,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-21 20:31:59,818 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:31:59,818 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] [2021-02-21 20:31:59,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:31:59,819 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:31:59,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:31:59,820 INFO L82 PathProgramCache]: Analyzing trace with hash -221630637, now seen corresponding path program 1 times [2021-02-21 20:31:59,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:31:59,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123979212] [2021-02-21 20:31:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:31:59,823 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:31:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:59,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:59,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:31:59,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:59,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:31:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:31:59,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:31:59,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:31:59,958 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 20:31:59,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123979212] [2021-02-21 20:31:59,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:31:59,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:31:59,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102225155] [2021-02-21 20:31:59,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:31:59,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:31:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:31:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:31:59,961 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand 4 states. [2021-02-21 20:32:00,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:00,403 INFO L93 Difference]: Finished difference Result 867 states and 1208 transitions. [2021-02-21 20:32:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:00,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-21 20:32:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:00,409 INFO L225 Difference]: With dead ends: 867 [2021-02-21 20:32:00,409 INFO L226 Difference]: Without dead ends: 593 [2021-02-21 20:32:00,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-02-21 20:32:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2021-02-21 20:32:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-21 20:32:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 810 transitions. [2021-02-21 20:32:00,525 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 810 transitions. Word has length 89 [2021-02-21 20:32:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:00,525 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 810 transitions. [2021-02-21 20:32:00,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 810 transitions. [2021-02-21 20:32:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-21 20:32:00,527 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:00,527 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] [2021-02-21 20:32:00,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:32:00,528 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2146544516, now seen corresponding path program 1 times [2021-02-21 20:32:00,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:00,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799802512] [2021-02-21 20:32:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:00,531 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:00,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:00,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:00,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:00,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:00,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:00,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:00,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:00,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:00,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:00,654 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 20:32:00,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799802512] [2021-02-21 20:32:00,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:00,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:00,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133704466] [2021-02-21 20:32:00,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:00,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:00,663 INFO L87 Difference]: Start difference. First operand 591 states and 810 transitions. Second operand 4 states. [2021-02-21 20:32:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:01,122 INFO L93 Difference]: Finished difference Result 723 states and 1004 transitions. [2021-02-21 20:32:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:01,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-21 20:32:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:01,129 INFO L225 Difference]: With dead ends: 723 [2021-02-21 20:32:01,129 INFO L226 Difference]: Without dead ends: 721 [2021-02-21 20:32:01,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-02-21 20:32:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 591. [2021-02-21 20:32:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-21 20:32:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 806 transitions. [2021-02-21 20:32:01,264 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 806 transitions. Word has length 90 [2021-02-21 20:32:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:01,265 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 806 transitions. [2021-02-21 20:32:01,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 806 transitions. [2021-02-21 20:32:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-21 20:32:01,268 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:01,268 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] [2021-02-21 20:32:01,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:32:01,269 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1719629177, now seen corresponding path program 1 times [2021-02-21 20:32:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:01,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154293051] [2021-02-21 20:32:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:01,276 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:01,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:01,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:01,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:01,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:01,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:01,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:01,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:01,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:01,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:01,400 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 20:32:01,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154293051] [2021-02-21 20:32:01,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:01,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:01,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729594195] [2021-02-21 20:32:01,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:01,403 INFO L87 Difference]: Start difference. First operand 591 states and 806 transitions. Second operand 4 states. [2021-02-21 20:32:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:01,893 INFO L93 Difference]: Finished difference Result 1635 states and 2272 transitions. [2021-02-21 20:32:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:01,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-21 20:32:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:01,900 INFO L225 Difference]: With dead ends: 1635 [2021-02-21 20:32:01,900 INFO L226 Difference]: Without dead ends: 1101 [2021-02-21 20:32:01,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-21 20:32:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2021-02-21 20:32:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1099 states. [2021-02-21 20:32:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1506 transitions. [2021-02-21 20:32:02,068 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1506 transitions. Word has length 90 [2021-02-21 20:32:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:02,069 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 1506 transitions. [2021-02-21 20:32:02,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1506 transitions. [2021-02-21 20:32:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-21 20:32:02,071 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:02,071 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] [2021-02-21 20:32:02,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:32:02,072 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1769141639, now seen corresponding path program 1 times [2021-02-21 20:32:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:02,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043591393] [2021-02-21 20:32:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:02,076 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:02,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:02,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:02,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:02,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:02,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:02,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:02,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:02,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:02,186 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 20:32:02,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043591393] [2021-02-21 20:32:02,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:02,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:02,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177483861] [2021-02-21 20:32:02,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:02,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:02,189 INFO L87 Difference]: Start difference. First operand 1099 states and 1506 transitions. Second operand 4 states. [2021-02-21 20:32:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:03,062 INFO L93 Difference]: Finished difference Result 3135 states and 4340 transitions. [2021-02-21 20:32:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:03,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-21 20:32:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:03,076 INFO L225 Difference]: With dead ends: 3135 [2021-02-21 20:32:03,076 INFO L226 Difference]: Without dead ends: 2093 [2021-02-21 20:32:03,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-02-21 20:32:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2021-02-21 20:32:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-21 20:32:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2858 transitions. [2021-02-21 20:32:03,439 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2858 transitions. Word has length 91 [2021-02-21 20:32:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:03,439 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2858 transitions. [2021-02-21 20:32:03,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2858 transitions. [2021-02-21 20:32:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-21 20:32:03,442 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:03,442 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] [2021-02-21 20:32:03,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:32:03,443 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2053505869, now seen corresponding path program 1 times [2021-02-21 20:32:03,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:03,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072068112] [2021-02-21 20:32:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:03,449 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:03,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:03,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:03,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:03,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:03,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:03,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:03,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:03,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:03,520 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 20:32:03,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072068112] [2021-02-21 20:32:03,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:03,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205990148] [2021-02-21 20:32:03,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:03,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:03,529 INFO L87 Difference]: Start difference. First operand 2091 states and 2858 transitions. Second operand 4 states. [2021-02-21 20:32:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:04,266 INFO L93 Difference]: Finished difference Result 2559 states and 3532 transitions. [2021-02-21 20:32:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:04,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-21 20:32:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:04,283 INFO L225 Difference]: With dead ends: 2559 [2021-02-21 20:32:04,283 INFO L226 Difference]: Without dead ends: 2557 [2021-02-21 20:32:04,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-02-21 20:32:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2091. [2021-02-21 20:32:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-21 20:32:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2842 transitions. [2021-02-21 20:32:04,609 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2842 transitions. Word has length 91 [2021-02-21 20:32:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:04,610 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2842 transitions. [2021-02-21 20:32:04,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2842 transitions. [2021-02-21 20:32:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-21 20:32:04,613 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:04,613 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] [2021-02-21 20:32:04,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:32:04,613 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:04,614 INFO L82 PathProgramCache]: Analyzing trace with hash -830691816, now seen corresponding path program 1 times [2021-02-21 20:32:04,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:04,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291284617] [2021-02-21 20:32:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:04,617 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:04,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:04,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:04,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:04,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:04,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:04,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:04,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:04,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:04,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:04,687 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 20:32:04,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291284617] [2021-02-21 20:32:04,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:04,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:04,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450748833] [2021-02-21 20:32:04,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:04,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:04,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:04,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:04,690 INFO L87 Difference]: Start difference. First operand 2091 states and 2842 transitions. Second operand 4 states. [2021-02-21 20:32:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:05,565 INFO L93 Difference]: Finished difference Result 2543 states and 3484 transitions. [2021-02-21 20:32:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:05,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-21 20:32:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:05,582 INFO L225 Difference]: With dead ends: 2543 [2021-02-21 20:32:05,582 INFO L226 Difference]: Without dead ends: 2541 [2021-02-21 20:32:05,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-02-21 20:32:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2091. [2021-02-21 20:32:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-21 20:32:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2826 transitions. [2021-02-21 20:32:05,913 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2826 transitions. Word has length 92 [2021-02-21 20:32:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:05,914 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2826 transitions. [2021-02-21 20:32:05,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2826 transitions. [2021-02-21 20:32:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-21 20:32:05,917 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:05,917 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] [2021-02-21 20:32:05,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:32:05,917 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash -990938963, now seen corresponding path program 1 times [2021-02-21 20:32:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229724948] [2021-02-21 20:32:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:05,921 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:05,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:05,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:05,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:05,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:05,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:05,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:05,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:05,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:05,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:05,989 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 20:32:05,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229724948] [2021-02-21 20:32:05,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:05,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:05,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042468103] [2021-02-21 20:32:05,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:05,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:05,992 INFO L87 Difference]: Start difference. First operand 2091 states and 2826 transitions. Second operand 4 states. [2021-02-21 20:32:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:07,143 INFO L93 Difference]: Finished difference Result 6063 states and 8236 transitions. [2021-02-21 20:32:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:07,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-21 20:32:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:07,169 INFO L225 Difference]: With dead ends: 6063 [2021-02-21 20:32:07,169 INFO L226 Difference]: Without dead ends: 4029 [2021-02-21 20:32:07,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-02-21 20:32:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4027. [2021-02-21 20:32:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-21 20:32:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5402 transitions. [2021-02-21 20:32:07,974 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5402 transitions. Word has length 92 [2021-02-21 20:32:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:07,974 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5402 transitions. [2021-02-21 20:32:07,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5402 transitions. [2021-02-21 20:32:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-21 20:32:07,980 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:07,981 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] [2021-02-21 20:32:07,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 20:32:07,981 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:07,982 INFO L82 PathProgramCache]: Analyzing trace with hash -46506463, now seen corresponding path program 1 times [2021-02-21 20:32:07,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:07,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964168995] [2021-02-21 20:32:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:07,985 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:08,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:08,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:08,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:08,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:08,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:08,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:08,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:08,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:08,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:08,073 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 20:32:08,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964168995] [2021-02-21 20:32:08,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:08,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:08,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087942834] [2021-02-21 20:32:08,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:08,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:08,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:08,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:08,076 INFO L87 Difference]: Start difference. First operand 4027 states and 5402 transitions. Second operand 4 states. [2021-02-21 20:32:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:09,563 INFO L93 Difference]: Finished difference Result 4863 states and 6556 transitions. [2021-02-21 20:32:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:09,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-21 20:32:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:09,588 INFO L225 Difference]: With dead ends: 4863 [2021-02-21 20:32:09,588 INFO L226 Difference]: Without dead ends: 4861 [2021-02-21 20:32:09,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-02-21 20:32:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4027. [2021-02-21 20:32:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-21 20:32:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5370 transitions. [2021-02-21 20:32:10,303 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5370 transitions. Word has length 93 [2021-02-21 20:32:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:10,304 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5370 transitions. [2021-02-21 20:32:10,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5370 transitions. [2021-02-21 20:32:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-21 20:32:10,309 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:10,309 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] [2021-02-21 20:32:10,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 20:32:10,309 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash -654091333, now seen corresponding path program 1 times [2021-02-21 20:32:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:10,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857471580] [2021-02-21 20:32:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:10,313 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:10,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:10,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:10,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:10,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:10,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:10,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:10,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:10,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:10,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:10,380 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 20:32:10,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857471580] [2021-02-21 20:32:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687710790] [2021-02-21 20:32:10,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:10,383 INFO L87 Difference]: Start difference. First operand 4027 states and 5370 transitions. Second operand 4 states. [2021-02-21 20:32:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:11,898 INFO L93 Difference]: Finished difference Result 11775 states and 15740 transitions. [2021-02-21 20:32:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:11,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-21 20:32:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:11,946 INFO L225 Difference]: With dead ends: 11775 [2021-02-21 20:32:11,946 INFO L226 Difference]: Without dead ends: 7805 [2021-02-21 20:32:11,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-02-21 20:32:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2021-02-21 20:32:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-21 20:32:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10298 transitions. [2021-02-21 20:32:13,944 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10298 transitions. Word has length 93 [2021-02-21 20:32:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:13,945 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10298 transitions. [2021-02-21 20:32:13,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10298 transitions. [2021-02-21 20:32:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-21 20:32:13,953 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:13,953 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] [2021-02-21 20:32:13,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 20:32:13,954 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1506563924, now seen corresponding path program 1 times [2021-02-21 20:32:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:13,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092865406] [2021-02-21 20:32:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:13,958 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:13,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:13,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:13,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:13,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:13,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:13,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:14,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:14,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:14,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:14,039 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 20:32:14,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092865406] [2021-02-21 20:32:14,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:14,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484932734] [2021-02-21 20:32:14,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:14,042 INFO L87 Difference]: Start difference. First operand 7803 states and 10298 transitions. Second operand 4 states. [2021-02-21 20:32:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:15,558 INFO L93 Difference]: Finished difference Result 9343 states and 12348 transitions. [2021-02-21 20:32:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:15,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-21 20:32:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:15,591 INFO L225 Difference]: With dead ends: 9343 [2021-02-21 20:32:15,592 INFO L226 Difference]: Without dead ends: 9341 [2021-02-21 20:32:15,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-02-21 20:32:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7803. [2021-02-21 20:32:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-21 20:32:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10234 transitions. [2021-02-21 20:32:16,523 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10234 transitions. Word has length 94 [2021-02-21 20:32:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:16,523 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10234 transitions. [2021-02-21 20:32:16,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10234 transitions. [2021-02-21 20:32:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-21 20:32:16,529 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:16,529 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] [2021-02-21 20:32:16,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 20:32:16,530 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1198250977, now seen corresponding path program 1 times [2021-02-21 20:32:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:16,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933858415] [2021-02-21 20:32:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:16,533 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:16,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:16,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:16,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:16,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:16,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:16,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:16,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:16,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:16,615 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 20:32:16,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933858415] [2021-02-21 20:32:16,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:16,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656456205] [2021-02-21 20:32:16,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:16,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:16,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:16,618 INFO L87 Difference]: Start difference. First operand 7803 states and 10234 transitions. Second operand 4 states. [2021-02-21 20:32:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:19,021 INFO L93 Difference]: Finished difference Result 22911 states and 30076 transitions. [2021-02-21 20:32:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:19,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-21 20:32:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:19,069 INFO L225 Difference]: With dead ends: 22911 [2021-02-21 20:32:19,070 INFO L226 Difference]: Without dead ends: 15165 [2021-02-21 20:32:19,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-02-21 20:32:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15163. [2021-02-21 20:32:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-21 20:32:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19642 transitions. [2021-02-21 20:32:21,099 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19642 transitions. Word has length 94 [2021-02-21 20:32:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:21,099 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19642 transitions. [2021-02-21 20:32:21,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19642 transitions. [2021-02-21 20:32:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-21 20:32:21,111 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:21,111 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] [2021-02-21 20:32:21,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 20:32:21,112 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:21,112 INFO L82 PathProgramCache]: Analyzing trace with hash 476295413, now seen corresponding path program 1 times [2021-02-21 20:32:21,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:21,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693109511] [2021-02-21 20:32:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:21,115 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:21,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:21,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:21,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:21,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:21,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:21,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:21,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:21,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:21,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:21,186 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 20:32:21,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693109511] [2021-02-21 20:32:21,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:21,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197933144] [2021-02-21 20:32:21,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:21,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:21,188 INFO L87 Difference]: Start difference. First operand 15163 states and 19642 transitions. Second operand 4 states. [2021-02-21 20:32:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:23,932 INFO L93 Difference]: Finished difference Result 17983 states and 23228 transitions. [2021-02-21 20:32:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:23,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-21 20:32:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:23,985 INFO L225 Difference]: With dead ends: 17983 [2021-02-21 20:32:23,986 INFO L226 Difference]: Without dead ends: 17981 [2021-02-21 20:32:23,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2021-02-21 20:32:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15163. [2021-02-21 20:32:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-21 20:32:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19514 transitions. [2021-02-21 20:32:26,474 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19514 transitions. Word has length 95 [2021-02-21 20:32:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19514 transitions. [2021-02-21 20:32:26,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19514 transitions. [2021-02-21 20:32:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-21 20:32:26,487 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:26,487 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] [2021-02-21 20:32:26,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 20:32:26,488 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679185, now seen corresponding path program 1 times [2021-02-21 20:32:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:26,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051471330] [2021-02-21 20:32:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:26,491 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:26,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:26,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:26,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:26,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:26,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:26,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:26,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:26,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:26,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:26,561 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 20:32:26,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051471330] [2021-02-21 20:32:26,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:26,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:26,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054914669] [2021-02-21 20:32:26,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:26,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:26,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:26,563 INFO L87 Difference]: Start difference. First operand 15163 states and 19514 transitions. Second operand 4 states. [2021-02-21 20:32:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:30,670 INFO L93 Difference]: Finished difference Result 44607 states and 57404 transitions. [2021-02-21 20:32:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:30,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-21 20:32:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:30,752 INFO L225 Difference]: With dead ends: 44607 [2021-02-21 20:32:30,753 INFO L226 Difference]: Without dead ends: 29501 [2021-02-21 20:32:30,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2021-02-21 20:32:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29499. [2021-02-21 20:32:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-21 20:32:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37434 transitions. [2021-02-21 20:32:35,326 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37434 transitions. Word has length 95 [2021-02-21 20:32:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:35,326 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37434 transitions. [2021-02-21 20:32:35,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37434 transitions. [2021-02-21 20:32:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-21 20:32:35,348 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:35,348 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] [2021-02-21 20:32:35,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 20:32:35,349 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1815393088, now seen corresponding path program 1 times [2021-02-21 20:32:35,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:35,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090963972] [2021-02-21 20:32:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:35,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:35,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:35,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:35,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:35,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:35,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:35,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:35,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:35,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:35,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:35,421 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 20:32:35,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090963972] [2021-02-21 20:32:35,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:35,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:35,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997625510] [2021-02-21 20:32:35,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:35,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:35,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:35,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:35,423 INFO L87 Difference]: Start difference. First operand 29499 states and 37434 transitions. Second operand 4 states. [2021-02-21 20:32:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:40,373 INFO L93 Difference]: Finished difference Result 34623 states and 43580 transitions. [2021-02-21 20:32:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:40,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-21 20:32:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:40,456 INFO L225 Difference]: With dead ends: 34623 [2021-02-21 20:32:40,456 INFO L226 Difference]: Without dead ends: 34621 [2021-02-21 20:32:40,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-02-21 20:32:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29499. [2021-02-21 20:32:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-21 20:32:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37178 transitions. [2021-02-21 20:32:44,763 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37178 transitions. Word has length 96 [2021-02-21 20:32:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:32:44,763 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37178 transitions. [2021-02-21 20:32:44,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:32:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37178 transitions. [2021-02-21 20:32:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-21 20:32:44,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:32:44,785 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] [2021-02-21 20:32:44,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-21 20:32:44,785 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:32:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:32:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 475832085, now seen corresponding path program 1 times [2021-02-21 20:32:44,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:32:44,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493480699] [2021-02-21 20:32:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:32:44,790 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:32:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:44,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:44,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:44,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:44,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:32:44,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:44,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:44,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:32:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:32:44,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:32:44,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:32:44,854 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 20:32:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493480699] [2021-02-21 20:32:44,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:32:44,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:32:44,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882557640] [2021-02-21 20:32:44,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:32:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:32:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:32:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:32:44,857 INFO L87 Difference]: Start difference. First operand 29499 states and 37178 transitions. Second operand 4 states. [2021-02-21 20:32:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:32:52,888 INFO L93 Difference]: Finished difference Result 86847 states and 109372 transitions. [2021-02-21 20:32:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:32:52,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-21 20:32:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:32:52,981 INFO L225 Difference]: With dead ends: 86847 [2021-02-21 20:32:52,981 INFO L226 Difference]: Without dead ends: 57405 [2021-02-21 20:32:53,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:32:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2021-02-21 20:33:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57403. [2021-02-21 20:33:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-21 20:33:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 71226 transitions. [2021-02-21 20:33:00,592 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 71226 transitions. Word has length 96 [2021-02-21 20:33:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:33:00,593 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 71226 transitions. [2021-02-21 20:33:00,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:33:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 71226 transitions. [2021-02-21 20:33:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-21 20:33:00,617 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:33:00,617 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] [2021-02-21 20:33:00,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-21 20:33:00,618 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:33:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:33:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash 377748425, now seen corresponding path program 1 times [2021-02-21 20:33:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:33:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950404495] [2021-02-21 20:33:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:33:00,621 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:33:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:33:00,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:00,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:00,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:00,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:33:00,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:00,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:33:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:33:00,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:00,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:00,685 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 20:33:00,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950404495] [2021-02-21 20:33:00,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:33:00,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:33:00,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247409946] [2021-02-21 20:33:00,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:33:00,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:33:00,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:33:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:33:00,689 INFO L87 Difference]: Start difference. First operand 57403 states and 71226 transitions. Second operand 4 states. [2021-02-21 20:33:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:33:09,066 INFO L93 Difference]: Finished difference Result 66623 states and 81468 transitions. [2021-02-21 20:33:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:33:09,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-21 20:33:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:33:09,163 INFO L225 Difference]: With dead ends: 66623 [2021-02-21 20:33:09,163 INFO L226 Difference]: Without dead ends: 66621 [2021-02-21 20:33:09,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:33:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2021-02-21 20:33:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57403. [2021-02-21 20:33:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-21 20:33:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 70714 transitions. [2021-02-21 20:33:16,938 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 70714 transitions. Word has length 97 [2021-02-21 20:33:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:33:16,938 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 70714 transitions. [2021-02-21 20:33:16,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:33:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 70714 transitions. [2021-02-21 20:33:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-21 20:33:16,962 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:33:16,962 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] [2021-02-21 20:33:16,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-21 20:33:16,963 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:33:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:33:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1866139683, now seen corresponding path program 1 times [2021-02-21 20:33:16,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:33:16,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937474867] [2021-02-21 20:33:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:33:16,965 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:33:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:33:16,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:16,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:16,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:16,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:33:16,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:16,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:33:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:33:17,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:17,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:17,035 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 20:33:17,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937474867] [2021-02-21 20:33:17,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:33:17,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:33:17,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573043616] [2021-02-21 20:33:17,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:33:17,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:33:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:33:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:33:17,037 INFO L87 Difference]: Start difference. First operand 57403 states and 70714 transitions. Second operand 4 states. [2021-02-21 20:33:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:33:31,807 INFO L93 Difference]: Finished difference Result 169021 states and 207931 transitions. [2021-02-21 20:33:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:33:31,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-21 20:33:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:33:31,929 INFO L225 Difference]: With dead ends: 169021 [2021-02-21 20:33:31,930 INFO L226 Difference]: Without dead ends: 57403 [2021-02-21 20:33:32,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:33:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57403 states. [2021-02-21 20:33:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57403 to 57403. [2021-02-21 20:33:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-21 20:33:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 68666 transitions. [2021-02-21 20:33:39,644 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 68666 transitions. Word has length 97 [2021-02-21 20:33:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:33:39,645 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 68666 transitions. [2021-02-21 20:33:39,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:33:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 68666 transitions. [2021-02-21 20:33:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-21 20:33:39,669 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:33:39,669 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] [2021-02-21 20:33:39,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-21 20:33:39,670 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:33:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:33:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1239562796, now seen corresponding path program 1 times [2021-02-21 20:33:39,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:33:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679822505] [2021-02-21 20:33:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:33:39,674 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:33:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:33:39,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:39,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:39,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:39,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:33:39,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:39,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:39,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:33:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:33:39,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:33:39,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:33:39,741 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 20:33:39,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679822505] [2021-02-21 20:33:39,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:33:39,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:33:39,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347985876] [2021-02-21 20:33:39,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:33:39,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:33:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:33:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:33:39,743 INFO L87 Difference]: Start difference. First operand 57403 states and 68666 transitions. Second operand 4 states. [2021-02-21 20:33:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:33:47,420 INFO L93 Difference]: Finished difference Result 57403 states and 68666 transitions. [2021-02-21 20:33:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:33:47,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2021-02-21 20:33:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:33:47,423 INFO L225 Difference]: With dead ends: 57403 [2021-02-21 20:33:47,423 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 20:33:47,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:33:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 20:33:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 20:33:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 20:33:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 20:33:47,477 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-02-21 20:33:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:33:47,477 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 20:33:47,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:33:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 20:33:47,478 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 20:33:47,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-21 20:33:47,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 20:34:07,295 WARN L202 SmtUtils]: Spent 19.66 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-21 20:34:11,759 WARN L202 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-21 20:35:15,017 WARN L202 SmtUtils]: Spent 1.05 m on a formula simplification that was a NOOP. DAG size: 2125 [2021-02-21 20:35:32,986 WARN L202 SmtUtils]: Spent 17.95 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2021-02-21 20:35:35,565 WARN L202 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2021-02-21 20:35:38,494 WARN L202 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2021-02-21 20:35:40,415 WARN L202 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-21 20:35:44,733 WARN L202 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2021-02-21 20:36:36,768 WARN L202 SmtUtils]: Spent 52.02 s on a formula simplification. DAG size of input: 5189 DAG size of output: 31 [2021-02-21 20:36:44,499 WARN L202 SmtUtils]: Spent 7.72 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2021-02-21 20:36:53,449 WARN L202 SmtUtils]: Spent 8.94 s on a formula simplification. DAG size of input: 2914 DAG size of output: 53 [2021-02-21 20:37:08,904 WARN L202 SmtUtils]: Spent 15.45 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-21 20:37:24,371 WARN L202 SmtUtils]: Spent 15.46 s on a formula simplification. DAG size of input: 2656 DAG size of output: 41 [2021-02-21 20:37:29,058 WARN L202 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2021-02-21 20:38:01,813 WARN L202 SmtUtils]: Spent 32.74 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2021-02-21 20:38:02,855 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2021-02-21 20:38:13,499 WARN L202 SmtUtils]: Spent 10.63 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2021-02-21 20:38:15,556 WARN L202 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2021-02-21 20:38:17,471 WARN L202 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-21 20:39:14,604 WARN L202 SmtUtils]: Spent 57.11 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-21 20:39:20,407 WARN L202 SmtUtils]: Spent 5.79 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2021-02-21 20:39:21,540 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2021-02-21 20:39:40,908 WARN L202 SmtUtils]: Spent 19.35 s on a formula simplification. DAG size of input: 3682 DAG size of output: 45 [2021-02-21 20:39:48,867 WARN L202 SmtUtils]: Spent 7.95 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2021-02-21 20:40:04,929 WARN L202 SmtUtils]: Spent 16.04 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-21 20:41:03,308 WARN L202 SmtUtils]: Spent 58.36 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-21 20:41:46,969 WARN L202 SmtUtils]: Spent 43.64 s on a formula simplification. DAG size of input: 5139 DAG size of output: 31 [2021-02-21 20:41:57,470 WARN L202 SmtUtils]: Spent 10.49 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2021-02-21 20:41:58,693 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2021-02-21 20:42:06,344 WARN L202 SmtUtils]: Spent 7.64 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2021-02-21 20:42:08,136 WARN L202 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-21 20:42:10,663 WARN L202 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 1504 DAG size of output: 55 [2021-02-21 20:42:36,895 WARN L202 SmtUtils]: Spent 26.21 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2021-02-21 20:43:07,657 WARN L202 SmtUtils]: Spent 30.75 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2021-02-21 20:43:09,481 WARN L202 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2021-02-21 20:43:24,715 WARN L202 SmtUtils]: Spent 15.23 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-21 20:44:24,153 WARN L202 SmtUtils]: Spent 59.42 s on a formula simplification. DAG size of input: 5218 DAG size of output: 39 [2021-02-21 20:44:28,835 WARN L202 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2021-02-21 20:44:33,008 WARN L202 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2021-02-21 20:45:25,408 WARN L202 SmtUtils]: Spent 52.38 s on a formula simplification. DAG size of input: 5211 DAG size of output: 31 [2021-02-21 20:45:29,546 WARN L202 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-21 20:45:33,824 WARN L202 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2021-02-21 20:45:40,021 WARN L202 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 2242 DAG size of output: 121 [2021-02-21 20:45:41,904 WARN L202 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-21 20:45:47,329 WARN L202 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 1888 DAG size of output: 47 [2021-02-21 20:45:51,619 WARN L202 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 2109 DAG size of output: 53