/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:20:03,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:20:03,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:20:03,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:20:03,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:20:03,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:20:03,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:20:03,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:20:03,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:20:03,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:20:03,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:20:03,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:20:03,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:20:03,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:20:03,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:20:03,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:20:03,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:20:03,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:20:03,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:20:03,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:20:03,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:20:03,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:20:03,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:20:03,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:20:03,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:20:03,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:20:03,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:20:03,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:20:03,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:20:03,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:20:03,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:20:03,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:20:03,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:20:03,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:20:03,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:20:03,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:20:03,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:20:03,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:20:03,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:20:03,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:20:03,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:20:03,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:20:03,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:20:03,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:20:03,129 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:20:03,129 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:20:03,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:20:03,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:20:03,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:20:03,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:20:03,379 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:20:03,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-06 08:20:03,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9760fa398/06fbac0d195d46bca0d4226e02b4ad1b/FLAG5757a96dc [2021-05-06 08:20:03,761 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:20:03,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-06 08:20:03,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9760fa398/06fbac0d195d46bca0d4226e02b4ad1b/FLAG5757a96dc [2021-05-06 08:20:03,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9760fa398/06fbac0d195d46bca0d4226e02b4ad1b [2021-05-06 08:20:03,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:20:03,777 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:20:03,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:03,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:20:03,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:20:03,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a7c82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03, skipping insertion in model container [2021-05-06 08:20:03,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:20:03,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:20:03,887 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2021-05-06 08:20:03,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:03,930 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:20:03,938 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2021-05-06 08:20:03,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:03,970 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:20:03,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03 WrapperNode [2021-05-06 08:20:03,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:03,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:20:03,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:20:03,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:20:03,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (1/1) ... [2021-05-06 08:20:03,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:20:03,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:20:03,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:20:03,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:20:03,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (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 [2021-05-06 08:20:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:20:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:20:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:20:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:20:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:20:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:20:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:20:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:20:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:20:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:20:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:20:04,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:20:04,241 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:20:04,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:04 BoogieIcfgContainer [2021-05-06 08:20:04,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:20:04,243 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:20:04,243 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:20:04,243 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:20:04,245 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:04" (1/1) ... [2021-05-06 08:20:04,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:04 BasicIcfg [2021-05-06 08:20:04,263 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:20:04,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:20:04,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:20:04,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:20:04,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:20:03" (1/4) ... [2021-05-06 08:20:04,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0106d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:04, skipping insertion in model container [2021-05-06 08:20:04,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:03" (2/4) ... [2021-05-06 08:20:04,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0106d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:04, skipping insertion in model container [2021-05-06 08:20:04,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:04" (3/4) ... [2021-05-06 08:20:04,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0106d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:04, skipping insertion in model container [2021-05-06 08:20:04,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:04" (4/4) ... [2021-05-06 08:20:04,282 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.cJordan [2021-05-06 08:20:04,286 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:20:04,288 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:20:04,299 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:20:04,312 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:20:04,312 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:20:04,312 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:20:04,312 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:20:04,312 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:20:04,313 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:20:04,313 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:20:04,313 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:20:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:20:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:20:04,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:04,328 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:04,328 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:20:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:04,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651381527] [2021-05-06 08:20:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:20:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:20:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:20:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:20:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:20:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:20:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:20:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:20:04,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651381527] [2021-05-06 08:20:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651381527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:04,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:04,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:20:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745784212] [2021-05-06 08:20:04,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:20:04,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:04,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:20:04,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:04,627 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:04,751 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:20:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:20:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 08:20:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:04,758 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:20:04,758 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:20:04,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:20:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:20:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:20:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:20:04,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:20:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:04,790 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:20:04,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:20:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:20:04,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:04,792 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:04,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:20:04,793 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:20:04,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:04,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470387623] [2021-05-06 08:20:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:04,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:04,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243176443] [2021-05-06 08:20:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:20:05,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:05,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470387623] [2021-05-06 08:20:05,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:05,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243176443] [2021-05-06 08:20:05,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243176443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:05,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:05,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:20:05,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302734105] [2021-05-06 08:20:05,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:05,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:05,044 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:05,124 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:20:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 08:20:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:05,127 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:20:05,127 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:20:05,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:20:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:20:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:20:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:20:05,144 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:20:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:05,144 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:20:05,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:20:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:20:05,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:05,147 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:05,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:20:05,363 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:05,363 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:20:05,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:05,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683493539] [2021-05-06 08:20:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:05,376 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:05,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985243172] [2021-05-06 08:20:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:05,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:20:05,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:05,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683493539] [2021-05-06 08:20:05,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:05,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985243172] [2021-05-06 08:20:05,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985243172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:05,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:05,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:05,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221847385] [2021-05-06 08:20:05,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:05,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:05,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:05,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:05,604 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:05,731 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:20:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 08:20:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:05,733 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:20:05,733 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:20:05,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:20:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:20:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:20:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:20:05,745 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:20:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:05,745 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:20:05,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:20:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:20:05,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:05,748 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:05,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:05,956 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:05,957 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:20:05,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:05,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290672763] [2021-05-06 08:20:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:05,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:05,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807211697] [2021-05-06 08:20:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:06,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:06,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:20:06,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:06,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290672763] [2021-05-06 08:20:06,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:06,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807211697] [2021-05-06 08:20:06,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807211697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:06,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:06,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:06,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458491114] [2021-05-06 08:20:06,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:06,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:06,195 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:20:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:06,281 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:20:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 08:20:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:06,284 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:20:06,284 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:20:06,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:20:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:20:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:20:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:20:06,289 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:20:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:06,289 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:20:06,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:20:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:20:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:20:06,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:06,290 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:06,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:06,507 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:20:06,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:06,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448285116] [2021-05-06 08:20:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:06,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101618634] [2021-05-06 08:20:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:20:06,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:06,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:20:06,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:06,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448285116] [2021-05-06 08:20:06,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:06,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101618634] [2021-05-06 08:20:06,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101618634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:06,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:06,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:06,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074630880] [2021-05-06 08:20:06,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:06,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:06,802 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:20:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:06,905 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:20:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 08:20:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:06,907 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:20:06,907 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:20:06,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:20:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:20:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:20:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:20:06,911 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:20:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:06,911 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:20:06,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:20:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:20:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:20:06,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:06,912 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:07,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:07,133 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:20:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806138450] [2021-05-06 08:20:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:07,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:07,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961864157] [2021-05-06 08:20:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:07,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:20:07,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806138450] [2021-05-06 08:20:07,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961864157] [2021-05-06 08:20:07,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961864157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:07,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:07,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150291395] [2021-05-06 08:20:07,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:07,338 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:20:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:07,428 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 08:20:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 08:20:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:07,429 INFO L225 Difference]: With dead ends: 62 [2021-05-06 08:20:07,430 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 08:20:07,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 08:20:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 08:20:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:20:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:20:07,433 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:20:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:07,434 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:20:07,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:20:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:20:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:20:07,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:07,435 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:07,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:20:07,637 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:20:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:07,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275123615] [2021-05-06 08:20:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:07,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:07,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669746152] [2021-05-06 08:20:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:20:07,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:07,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:20:07,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:07,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275123615] [2021-05-06 08:20:07,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:07,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669746152] [2021-05-06 08:20:07,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669746152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:07,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:07,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:07,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062591078] [2021-05-06 08:20:07,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:07,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:07,930 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:08,098 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-05-06 08:20:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 08:20:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:08,100 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:20:08,100 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 08:20:08,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 08:20:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 08:20:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:20:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 08:20:08,108 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 08:20:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:08,108 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 08:20:08,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 08:20:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:20:08,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:08,109 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:08,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:08,322 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:20:08,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:08,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653813413] [2021-05-06 08:20:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:08,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:08,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837066914] [2021-05-06 08:20:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:08,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:20:08,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653813413] [2021-05-06 08:20:08,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837066914] [2021-05-06 08:20:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837066914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:08,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:08,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:08,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916673238] [2021-05-06 08:20:08,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:08,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:08,498 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:08,641 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2021-05-06 08:20:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 08:20:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:08,643 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:20:08,643 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:20:08,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:20:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 08:20:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:20:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 08:20:08,652 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 08:20:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:08,652 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 08:20:08,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 08:20:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:20:08,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:08,653 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:08,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:08,865 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2044653414, now seen corresponding path program 1 times [2021-05-06 08:20:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:08,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214513414] [2021-05-06 08:20:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:08,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:08,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277190932] [2021-05-06 08:20:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:20:09,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:09,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214513414] [2021-05-06 08:20:09,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:09,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277190932] [2021-05-06 08:20:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277190932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:09,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:09,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:20:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553076445] [2021-05-06 08:20:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:20:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:20:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:09,083 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:09,278 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-05-06 08:20:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 08:20:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:09,280 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:20:09,280 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:20:09,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:20:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 08:20:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:20:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 08:20:09,286 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 08:20:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:09,286 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 08:20:09,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 08:20:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:20:09,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:09,287 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:09,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:20:09,505 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 2 times [2021-05-06 08:20:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:09,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083703128] [2021-05-06 08:20:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:09,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:09,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893848064] [2021-05-06 08:20:09,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:09,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:20:09,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083703128] [2021-05-06 08:20:09,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893848064] [2021-05-06 08:20:09,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893848064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:09,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:09,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:09,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126399582] [2021-05-06 08:20:09,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:09,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:09,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:09,707 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:20:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:09,818 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2021-05-06 08:20:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:09,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 08:20:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:09,819 INFO L225 Difference]: With dead ends: 107 [2021-05-06 08:20:09,819 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:20:09,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:20:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 08:20:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:20:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 08:20:09,825 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 08:20:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:09,825 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 08:20:09,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:20:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 08:20:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:20:09,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:09,826 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:10,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:10,043 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 3 times [2021-05-06 08:20:10,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:10,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517091004] [2021-05-06 08:20:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:10,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:10,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006777682] [2021-05-06 08:20:10,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:10,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:10,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:20:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:10,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 08:20:10,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517091004] [2021-05-06 08:20:10,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006777682] [2021-05-06 08:20:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006777682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:10,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:10,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:10,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922140351] [2021-05-06 08:20:10,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:10,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:10,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:10,385 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:20:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:10,627 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2021-05-06 08:20:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-06 08:20:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:10,631 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:20:10,631 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:20:10,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:20:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:20:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 08:20:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:20:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 08:20:10,645 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 08:20:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:10,646 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 08:20:10,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:20:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 08:20:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:20:10,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:10,648 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:10,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:10,867 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 4 times [2021-05-06 08:20:10,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:10,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336890567] [2021-05-06 08:20:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:10,874 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:10,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645214200] [2021-05-06 08:20:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:10,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:20:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:20:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-06 08:20:11,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336890567] [2021-05-06 08:20:11,095 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645214200] [2021-05-06 08:20:11,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645214200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:11,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:11,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:11,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991731736] [2021-05-06 08:20:11,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:11,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:11,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:11,096 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:20:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:11,265 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2021-05-06 08:20:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2021-05-06 08:20:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:11,266 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:20:11,266 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:20:11,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:20:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 08:20:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:20:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 08:20:11,273 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 08:20:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:11,274 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 08:20:11,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:20:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 08:20:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:20:11,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:11,275 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:11,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:20:11,485 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:20:11,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:11,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992138567] [2021-05-06 08:20:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:11,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:11,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610954561] [2021-05-06 08:20:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:11,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:11,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:11,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:20:11,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:11,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:20:11,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992138567] [2021-05-06 08:20:11,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610954561] [2021-05-06 08:20:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610954561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:11,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:11,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:20:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212640915] [2021-05-06 08:20:11,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:20:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:20:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:11,824 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:20:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:12,151 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2021-05-06 08:20:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:20:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 08:20:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:12,152 INFO L225 Difference]: With dead ends: 150 [2021-05-06 08:20:12,153 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 08:20:12,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:20:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 08:20:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 08:20:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 08:20:12,164 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 08:20:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:12,166 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 08:20:12,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:20:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 08:20:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:20:12,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:12,167 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:12,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:20:12,371 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:20:12,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:12,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705174741] [2021-05-06 08:20:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:12,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:12,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813348681] [2021-05-06 08:20:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:20:12,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 08:20:12,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705174741] [2021-05-06 08:20:12,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813348681] [2021-05-06 08:20:12,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813348681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:12,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:12,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:12,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86608164] [2021-05-06 08:20:12,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:12,638 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:20:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:12,900 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2021-05-06 08:20:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 08:20:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:12,901 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:20:12,902 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:20:12,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:20:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 08:20:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:20:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 08:20:12,907 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 08:20:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:12,907 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 08:20:12,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:20:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 08:20:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:20:12,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:12,908 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:13,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:20:13,121 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash -761940128, now seen corresponding path program 1 times [2021-05-06 08:20:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884413553] [2021-05-06 08:20:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:13,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:13,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569923927] [2021-05-06 08:20:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:20:13,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:13,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 08:20:13,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:13,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884413553] [2021-05-06 08:20:13,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:13,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569923927] [2021-05-06 08:20:13,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569923927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:13,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:13,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:20:13,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443451426] [2021-05-06 08:20:13,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:13,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:13,287 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:13,336 INFO L93 Difference]: Finished difference Result 195 states and 269 transitions. [2021-05-06 08:20:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 08:20:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:13,337 INFO L225 Difference]: With dead ends: 195 [2021-05-06 08:20:13,337 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 08:20:13,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 08:20:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 08:20:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:20:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 08:20:13,342 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 08:20:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:13,342 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 08:20:13,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 08:20:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:20:13,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:13,343 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:13,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:13,561 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 5 times [2021-05-06 08:20:13,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:13,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636500182] [2021-05-06 08:20:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:13,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:13,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473744677] [2021-05-06 08:20:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:13,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 08:20:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:20:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:13,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 08:20:13,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636500182] [2021-05-06 08:20:13,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473744677] [2021-05-06 08:20:13,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473744677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:13,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:13,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816377367] [2021-05-06 08:20:13,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:13,766 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:20:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:13,808 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2021-05-06 08:20:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 08:20:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:13,809 INFO L225 Difference]: With dead ends: 160 [2021-05-06 08:20:13,809 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 08:20:13,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 08:20:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 08:20:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 08:20:13,814 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 08:20:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:13,814 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 08:20:13,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:20:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 08:20:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:20:13,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:13,815 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:14,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:20:14,029 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 2 times [2021-05-06 08:20:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:14,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64629034] [2021-05-06 08:20:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:14,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:14,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742400813] [2021-05-06 08:20:14,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:14,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:14,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:14,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:20:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:14,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 75 proven. 49 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 08:20:14,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:14,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64629034] [2021-05-06 08:20:14,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:14,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742400813] [2021-05-06 08:20:14,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742400813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:14,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:14,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:20:14,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681104508] [2021-05-06 08:20:14,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:20:14,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:20:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:14,461 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:20:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:14,807 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2021-05-06 08:20:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:20:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 107 [2021-05-06 08:20:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:14,808 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:20:14,808 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:20:14,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:20:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-06 08:20:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 92 states have internal predecessors, (95), 49 states have call successors, (49), 18 states have call predecessors, (49), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-05-06 08:20:14,812 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 107 [2021-05-06 08:20:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:14,812 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-05-06 08:20:14,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:20:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-05-06 08:20:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:20:14,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:14,813 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:15,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:20:15,029 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-06 08:20:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:15,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421197195] [2021-05-06 08:20:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:15,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:15,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933927665] [2021-05-06 08:20:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:15,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:20:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:15,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:20:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:15,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 08:20:15,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:15,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421197195] [2021-05-06 08:20:15,214 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:15,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933927665] [2021-05-06 08:20:15,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933927665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:15,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:15,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354595822] [2021-05-06 08:20:15,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:15,215 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:15,263 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-05-06 08:20:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:15,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 08:20:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:15,264 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:20:15,265 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 08:20:15,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 08:20:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-06 08:20:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 08:20:15,268 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 111 [2021-05-06 08:20:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:15,269 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 08:20:15,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 08:20:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:20:15,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:15,269 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:15,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:20:15,481 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-06 08:20:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574088741] [2021-05-06 08:20:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:15,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493906845] [2021-05-06 08:20:15,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:15,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:15,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:15,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:20:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 73 proven. 31 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 08:20:15,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574088741] [2021-05-06 08:20:15,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493906845] [2021-05-06 08:20:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493906845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:15,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:20:15,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393364934] [2021-05-06 08:20:15,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:20:15,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:20:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:15,894 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:20:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:16,465 INFO L93 Difference]: Finished difference Result 190 states and 239 transitions. [2021-05-06 08:20:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:16,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2021-05-06 08:20:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:16,467 INFO L225 Difference]: With dead ends: 190 [2021-05-06 08:20:16,467 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 08:20:16,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:20:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 08:20:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-06 08:20:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:20:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2021-05-06 08:20:16,472 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 113 [2021-05-06 08:20:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:16,472 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2021-05-06 08:20:16,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:20:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2021-05-06 08:20:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:20:16,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:16,473 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:16,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:16,689 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-06 08:20:16,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:16,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229295286] [2021-05-06 08:20:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:16,694 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:16,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111513718] [2021-05-06 08:20:16,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:16,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:16,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:16,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 08:20:16,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:16,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229295286] [2021-05-06 08:20:16,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:16,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111513718] [2021-05-06 08:20:16,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111513718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:16,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:16,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:16,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827461047] [2021-05-06 08:20:16,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:16,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:16,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:16,936 INFO L87 Difference]: Start difference. First operand 187 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:20:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:17,081 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2021-05-06 08:20:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:17,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 08:20:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:17,082 INFO L225 Difference]: With dead ends: 226 [2021-05-06 08:20:17,082 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 08:20:17,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 08:20:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-05-06 08:20:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 112 states have (on average 1.125) internal successors, (126), 113 states have internal predecessors, (126), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:20:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2021-05-06 08:20:17,087 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 116 [2021-05-06 08:20:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:17,088 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2021-05-06 08:20:17,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:20:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2021-05-06 08:20:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:20:17,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:17,089 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:17,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:17,297 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-06 08:20:17,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:17,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362143578] [2021-05-06 08:20:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:17,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:17,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022346675] [2021-05-06 08:20:17,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:17,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 08:20:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:17,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 08:20:17,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:17,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362143578] [2021-05-06 08:20:17,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:17,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022346675] [2021-05-06 08:20:17,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022346675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:17,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:17,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:20:17,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295274287] [2021-05-06 08:20:17,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:20:17,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:17,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:20:17,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:17,722 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:20:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:18,129 INFO L93 Difference]: Finished difference Result 243 states and 318 transitions. [2021-05-06 08:20:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 08:20:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:18,131 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:20:18,131 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:20:18,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:20:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:20:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-05-06 08:20:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:20:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2021-05-06 08:20:18,137 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 127 [2021-05-06 08:20:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:18,137 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2021-05-06 08:20:18,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:20:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2021-05-06 08:20:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:20:18,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:18,138 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:18,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:20:18,353 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-06 08:20:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:18,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737388446] [2021-05-06 08:20:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:18,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:18,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468199971] [2021-05-06 08:20:18,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:18,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:20:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:20:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:18,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 89 proven. 108 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:20:18,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:18,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737388446] [2021-05-06 08:20:18,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:18,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468199971] [2021-05-06 08:20:18,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468199971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:18,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:18,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:18,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87922658] [2021-05-06 08:20:18,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:18,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:18,767 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:20:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:19,173 INFO L93 Difference]: Finished difference Result 246 states and 320 transitions. [2021-05-06 08:20:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:20:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 129 [2021-05-06 08:20:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:19,174 INFO L225 Difference]: With dead ends: 246 [2021-05-06 08:20:19,174 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 08:20:19,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 08:20:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-05-06 08:20:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:20:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 317 transitions. [2021-05-06 08:20:19,182 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 317 transitions. Word has length 129 [2021-05-06 08:20:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:19,182 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 317 transitions. [2021-05-06 08:20:19,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:20:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 317 transitions. [2021-05-06 08:20:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:20:19,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:19,183 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:19,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:20:19,397 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-06 08:20:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:19,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984000336] [2021-05-06 08:20:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:19,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:19,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072376937] [2021-05-06 08:20:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:19,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:20:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-06 08:20:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:19,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 92 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:20:19,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:19,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984000336] [2021-05-06 08:20:19,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:19,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072376937] [2021-05-06 08:20:19,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072376937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:19,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:19,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:20:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760830048] [2021-05-06 08:20:19,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:20:19,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:20:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:19,959 INFO L87 Difference]: Start difference. First operand 243 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:20:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:20,502 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2021-05-06 08:20:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:20:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 08:20:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:20,503 INFO L225 Difference]: With dead ends: 255 [2021-05-06 08:20:20,503 INFO L226 Difference]: Without dead ends: 255 [2021-05-06 08:20:20,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-06 08:20:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2021-05-06 08:20:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 140 states have internal predecessors, (155), 85 states have call successors, (85), 27 states have call predecessors, (85), 26 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:20:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 323 transitions. [2021-05-06 08:20:20,510 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 323 transitions. Word has length 132 [2021-05-06 08:20:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:20,511 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 323 transitions. [2021-05-06 08:20:20,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:20:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 323 transitions. [2021-05-06 08:20:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 08:20:20,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:20,512 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:20,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:20,717 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-06 08:20:20,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:20,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546739407] [2021-05-06 08:20:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:20,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:20,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818638744] [2021-05-06 08:20:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:20,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:20:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:20:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:20,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,977 WARN L205 SmtUtils]: Spent 43.91 s on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-06 08:21:04,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,588 WARN L205 SmtUtils]: Spent 26.38 s on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-06 08:21:31,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 93 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 08:21:31,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:31,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546739407] [2021-05-06 08:21:31,884 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:31,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818638744] [2021-05-06 08:21:31,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818638744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:31,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:31,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:21:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666467352] [2021-05-06 08:21:31,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:21:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:21:31,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:21:31,885 INFO L87 Difference]: Start difference. First operand 251 states and 323 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 08:21:32,659 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-06 08:21:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:45,874 INFO L93 Difference]: Finished difference Result 294 states and 383 transitions. [2021-05-06 08:21:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 135 [2021-05-06 08:21:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:45,876 INFO L225 Difference]: With dead ends: 294 [2021-05-06 08:21:45,876 INFO L226 Difference]: Without dead ends: 293 [2021-05-06 08:21:45,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 71107.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-06 08:21:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2021-05-06 08:21:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 101 states have call successors, (101), 30 states have call predecessors, (101), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:21:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 378 transitions. [2021-05-06 08:21:45,882 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 378 transitions. Word has length 135 [2021-05-06 08:21:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:45,883 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 378 transitions. [2021-05-06 08:21:45,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 08:21:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 378 transitions. [2021-05-06 08:21:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 08:21:45,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,884 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:46,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:21:46,084 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-06 08:21:46,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:46,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797645301] [2021-05-06 08:21:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:46,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:46,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448802289] [2021-05-06 08:21:46,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:46,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:21:46,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 08:21:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-05-06 08:21:46,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:46,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797645301] [2021-05-06 08:21:46,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:46,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448802289] [2021-05-06 08:21:46,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448802289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:46,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:46,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169544791] [2021-05-06 08:21:46,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:46,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:46,553 INFO L87 Difference]: Start difference. First operand 290 states and 378 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 08:21:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:47,145 INFO L93 Difference]: Finished difference Result 338 states and 442 transitions. [2021-05-06 08:21:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:21:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2021-05-06 08:21:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:47,147 INFO L225 Difference]: With dead ends: 338 [2021-05-06 08:21:47,147 INFO L226 Difference]: Without dead ends: 337 [2021-05-06 08:21:47,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:21:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-06 08:21:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-05-06 08:21:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 167 states have (on average 1.1197604790419162) internal successors, (187), 168 states have internal predecessors, (187), 105 states have call successors, (105), 32 states have call predecessors, (105), 31 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 08:21:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 395 transitions. [2021-05-06 08:21:47,154 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 395 transitions. Word has length 138 [2021-05-06 08:21:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:47,154 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 395 transitions. [2021-05-06 08:21:47,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 08:21:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 395 transitions. [2021-05-06 08:21:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:21:47,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:47,155 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:47,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:47,361 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 6 times [2021-05-06 08:21:47,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:47,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29796217] [2021-05-06 08:21:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:47,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:47,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123304649] [2021-05-06 08:21:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:47,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:21:47,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:21:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:47,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,838 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 08:21:47,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,157 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 08:21:48,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,003 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-06 08:21:49,290 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 08:21:49,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,675 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-06 08:21:49,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,257 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-06 08:21:50,553 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 08:21:50,787 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-06 08:21:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 140 proven. 135 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2021-05-06 08:21:51,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:51,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29796217] [2021-05-06 08:21:51,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:51,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123304649] [2021-05-06 08:21:51,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123304649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:51,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:51,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 08:21:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265060908] [2021-05-06 08:21:51,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:21:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:21:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:51,234 INFO L87 Difference]: Start difference. First operand 304 states and 395 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 08:21:53,603 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-06 08:21:54,360 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-06 08:21:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:57,368 INFO L93 Difference]: Finished difference Result 395 states and 523 transitions. [2021-05-06 08:21:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:57,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 149 [2021-05-06 08:21:57,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:57,370 INFO L225 Difference]: With dead ends: 395 [2021-05-06 08:21:57,370 INFO L226 Difference]: Without dead ends: 395 [2021-05-06 08:21:57,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4323.5ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:21:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-06 08:21:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2021-05-06 08:21:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 212 states have (on average 1.1273584905660377) internal successors, (239), 213 states have internal predecessors, (239), 141 states have call successors, (141), 38 states have call predecessors, (141), 37 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:21:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 519 transitions. [2021-05-06 08:21:57,378 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 519 transitions. Word has length 149 [2021-05-06 08:21:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:57,378 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 519 transitions. [2021-05-06 08:21:57,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 08:21:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 519 transitions. [2021-05-06 08:21:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:21:57,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:57,379 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:57,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:21:57,597 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 7 times [2021-05-06 08:21:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:57,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732332831] [2021-05-06 08:21:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:57,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:57,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310460211] [2021-05-06 08:21:57,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:21:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:57,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 190 proven. 173 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-05-06 08:21:58,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732332831] [2021-05-06 08:21:58,508 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310460211] [2021-05-06 08:21:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310460211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:58,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:58,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:21:58,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492090516] [2021-05-06 08:21:58,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:21:58,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:21:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:21:58,509 INFO L87 Difference]: Start difference. First operand 391 states and 519 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 08:21:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:59,797 INFO L93 Difference]: Finished difference Result 409 states and 533 transitions. [2021-05-06 08:21:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:21:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-06 08:21:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:59,799 INFO L225 Difference]: With dead ends: 409 [2021-05-06 08:21:59,799 INFO L226 Difference]: Without dead ends: 409 [2021-05-06 08:21:59,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 648.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:21:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-06 08:21:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 370. [2021-05-06 08:21:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 203 states have (on average 1.1231527093596059) internal successors, (228), 204 states have internal predecessors, (228), 129 states have call successors, (129), 38 states have call predecessors, (129), 37 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 08:21:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 484 transitions. [2021-05-06 08:21:59,807 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 484 transitions. Word has length 151 [2021-05-06 08:21:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:59,807 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 484 transitions. [2021-05-06 08:21:59,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 08:21:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 484 transitions. [2021-05-06 08:21:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:21:59,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:59,808 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:00,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:22:00,026 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 8 times [2021-05-06 08:22:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:00,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165970761] [2021-05-06 08:22:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:00,032 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:00,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472011802] [2021-05-06 08:22:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:00,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:00,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-06 08:22:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:00,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,004 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-06 08:22:01,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,913 WARN L205 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-06 08:22:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,707 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-06 08:22:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 180 proven. 113 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-05-06 08:22:08,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:08,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165970761] [2021-05-06 08:22:08,809 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:08,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472011802] [2021-05-06 08:22:08,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472011802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:08,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:08,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:08,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070046009] [2021-05-06 08:22:08,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:22:08,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:22:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:08,811 INFO L87 Difference]: Start difference. First operand 370 states and 484 transitions. Second operand has 19 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (28), 1 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 08:22:10,605 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-06 08:22:10,917 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-06 08:22:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:12,970 INFO L93 Difference]: Finished difference Result 376 states and 490 transitions. [2021-05-06 08:22:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:22:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (28), 1 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2021-05-06 08:22:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:12,971 INFO L225 Difference]: With dead ends: 376 [2021-05-06 08:22:12,971 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:12,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 8825.9ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:22:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:12,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 154 [2021-05-06 08:22:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:12,972 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:12,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (28), 1 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 08:22:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:12,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:13,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 08:22:13,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:13 BasicIcfg [2021-05-06 08:22:13,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:13,192 INFO L168 Benchmark]: Toolchain (without parser) took 129415.39 ms. Allocated memory was 199.2 MB in the beginning and 425.7 MB in the end (delta: 226.5 MB). Free memory was 163.8 MB in the beginning and 271.5 MB in the end (delta: -107.7 MB). Peak memory consumption was 119.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:13,192 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:13,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.98 ms. Allocated memory is still 199.2 MB. Free memory was 163.7 MB in the beginning and 181.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:13,192 INFO L168 Benchmark]: Boogie Preprocessor took 18.57 ms. Allocated memory is still 199.2 MB. Free memory was 181.1 MB in the beginning and 179.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:13,192 INFO L168 Benchmark]: RCFGBuilder took 251.70 ms. Allocated memory is still 199.2 MB. Free memory was 179.5 MB in the beginning and 162.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:13,193 INFO L168 Benchmark]: IcfgTransformer took 20.76 ms. Allocated memory is still 199.2 MB. Free memory was 162.7 MB in the beginning and 161.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:13,193 INFO L168 Benchmark]: TraceAbstraction took 128927.39 ms. Allocated memory was 199.2 MB in the beginning and 425.7 MB in the end (delta: 226.5 MB). Free memory was 160.9 MB in the beginning and 271.5 MB in the end (delta: -110.6 MB). Peak memory consumption was 117.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:13,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 192.98 ms. Allocated memory is still 199.2 MB. Free memory was 163.7 MB in the beginning and 181.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.57 ms. Allocated memory is still 199.2 MB. Free memory was 181.1 MB in the beginning and 179.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 251.70 ms. Allocated memory is still 199.2 MB. Free memory was 179.5 MB in the beginning and 162.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.76 ms. Allocated memory is still 199.2 MB. Free memory was 162.7 MB in the beginning and 161.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 128927.39 ms. Allocated memory was 199.2 MB in the beginning and 425.7 MB in the end (delta: 226.5 MB). Free memory was 160.9 MB in the beginning and 271.5 MB in the end (delta: -110.6 MB). Peak memory consumption was 117.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 128878.6ms, OverallIterations: 28, TraceHistogramMax: 20, EmptinessCheckTime: 31.8ms, AutomataDifference: 31040.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1327 SDtfs, 758 SDslu, 7731 SDs, 0 SdLazy, 8629 SolverSat, 833 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26592.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2752 GetRequests, 2370 SyntacticMatches, 16 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 87580.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=26, InterpolantAutomatonStates: 303, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 187.6ms AutomataMinimizationTime, 28 MinimizatonAttempts, 214 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 247.6ms SsaConstructionTime, 1024.6ms SatisfiabilityAnalysisTime, 89497.7ms InterpolantComputationTime, 2682 NumberOfCodeBlocks, 2404 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2654 ConstructedInterpolants, 7 QuantifiedInterpolants, 16408 SizeOfPredicates, 198 NumberOfNonLiveVariables, 6865 ConjunctsInSsa, 989 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 7575/8659 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...