/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/sqrt1-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:28,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:28,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:28,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:51:28,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:51:28,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:51:28,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:51:28,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:51:28,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:51:28,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:51:28,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:51:28,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:51:28,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:28,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:28,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:28,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:28,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:28,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:28,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:28,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:28,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:28,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:28,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:28,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:28,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:28,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:28,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:28,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:28,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:28,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:28,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:28,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:28,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:28,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:28,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:28,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:28,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:28,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:28,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:28,598 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:28,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:28,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:28,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:28,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:28,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:28,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:28,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:28,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:28,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:28,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:28,600 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:28,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:28,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:28,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:28,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:28,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:28,895 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:28,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound100.c [2021-05-02 22:51:28,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42de1dd71/ae1c07591e854d5996173b0e0668ca56/FLAG52099ad63 [2021-05-02 22:51:29,438 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:29,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound100.c [2021-05-02 22:51:29,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42de1dd71/ae1c07591e854d5996173b0e0668ca56/FLAG52099ad63 [2021-05-02 22:51:29,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42de1dd71/ae1c07591e854d5996173b0e0668ca56 [2021-05-02 22:51:29,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:29,467 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:29,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:29,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:29,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:29,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89ca3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29, skipping insertion in model container [2021-05-02 22:51:29,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:29,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:29,611 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/sqrt1-ll_valuebound100.c[520,533] [2021-05-02 22:51:29,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:29,644 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:29,660 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/sqrt1-ll_valuebound100.c[520,533] [2021-05-02 22:51:29,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:29,690 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:29,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29 WrapperNode [2021-05-02 22:51:29,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:29,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:29,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:29,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:29,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (1/1) ... [2021-05-02 22:51:29,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:29,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:29,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:29,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:29,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (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 [2021-05-02 22:51:29,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:29,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:29,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:29,836 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:29,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:29,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:30,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:30,124 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:30,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:30 BoogieIcfgContainer [2021-05-02 22:51:30,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:30,126 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:30,126 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:30,127 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:30,138 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:30" (1/1) ... [2021-05-02 22:51:30,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:30 BasicIcfg [2021-05-02 22:51:30,152 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:30,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:30,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:30,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:30,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:29" (1/4) ... [2021-05-02 22:51:30,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c60661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:30, skipping insertion in model container [2021-05-02 22:51:30,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:29" (2/4) ... [2021-05-02 22:51:30,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c60661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:30, skipping insertion in model container [2021-05-02 22:51:30,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:30" (3/4) ... [2021-05-02 22:51:30,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c60661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:30, skipping insertion in model container [2021-05-02 22:51:30,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:30" (4/4) ... [2021-05-02 22:51:30,180 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound100.cJordan [2021-05-02 22:51:30,184 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:30,188 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:30,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:30,218 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:30,218 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:30,219 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:30,219 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:30,219 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:30,219 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:30,219 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:30,219 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:30,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:30,237 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:30,237 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:30,242 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-02 22:51:30,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:30,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121218385] [2021-05-02 22:51:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:30,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:30,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:30,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:30,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121218385] [2021-05-02 22:51:30,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121218385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:30,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:30,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:30,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704372605] [2021-05-02 22:51:30,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:30,492 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:30,649 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 22:51:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:30,658 INFO L225 Difference]: With dead ends: 31 [2021-05-02 22:51:30,658 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:51:30,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:51:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:51:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:51:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 22:51:30,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 22:51:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:30,699 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 22:51:30,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 22:51:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:30,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:30,701 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:30,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:30,701 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:30,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:30,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-02 22:51:30,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:30,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147030279] [2021-05-02 22:51:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:30,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:30,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:30,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:30,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147030279] [2021-05-02 22:51:30,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147030279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:30,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:30,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:30,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425327570] [2021-05-02 22:51:30,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:30,886 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:31,356 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:31,358 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:31,358 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 22:51:31,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 22:51:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 22:51:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:51:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 22:51:31,367 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 22:51:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:31,367 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 22:51:31,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 22:51:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:51:31,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:31,368 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:31,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:31,369 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-02 22:51:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:31,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868850376] [2021-05-02 22:51:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:31,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:31,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648099209] [2021-05-02 22:51:31,382 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 [2021-05-02 22:51:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:31,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:31,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868850376] [2021-05-02 22:51:31,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:31,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648099209] [2021-05-02 22:51:31,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648099209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:31,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:31,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:31,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447955774] [2021-05-02 22:51:31,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:31,706 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:31,888 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 22:51:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:31,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:51:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:31,891 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:51:31,891 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 22:51:31,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 22:51:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 22:51:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 22:51:31,905 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 22:51:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:31,905 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 22:51:31,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 22:51:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:51:31,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:31,907 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:32,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 22:51:32,130 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:32,131 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-02 22:51:32,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:32,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775082204] [2021-05-02 22:51:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:32,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:32,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853290643] [2021-05-02 22:51:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 22:51:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:32,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:32,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:32,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775082204] [2021-05-02 22:51:32,386 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:32,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853290643] [2021-05-02 22:51:32,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853290643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:32,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:32,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:32,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899814262] [2021-05-02 22:51:32,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:32,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:32,388 INFO L87 Difference]: Start difference. First operand 39 states and 45 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:32,482 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-02 22:51:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:32,483 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 22:51:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:32,484 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:32,484 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:32,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:51:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:51:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 22:51:32,490 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 22:51:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:32,490 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 22:51:32,490 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 22:51:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 22:51:32,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:32,491 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 22:51:32,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:32,705 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-02 22:51:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:32,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732180154] [2021-05-02 22:51:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:32,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:32,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712069206] [2021-05-02 22:51:32,717 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 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 [2021-05-02 22:51:32,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 22:51:32,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732180154] [2021-05-02 22:51:32,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712069206] [2021-05-02 22:51:32,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712069206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:32,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:32,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:32,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553130701] [2021-05-02 22:51:32,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:32,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:32,928 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:33,094 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 22:51:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 22:51:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:33,096 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:51:33,096 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:51:33,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:51:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 22:51:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:51:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 22:51:33,108 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 22:51:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:33,109 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 22:51:33,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 22:51:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:51:33,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:33,110 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 22:51:33,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:33,330 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-02 22:51:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:33,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487695438] [2021-05-02 22:51:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:33,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:33,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040252592] [2021-05-02 22:51:33,342 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 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 [2021-05-02 22:51:33,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:51:33,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:33,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 22:51:33,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:33,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487695438] [2021-05-02 22:51:33,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:33,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040252592] [2021-05-02 22:51:33,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040252592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:33,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:33,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624296596] [2021-05-02 22:51:33,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:33,583 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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), 3 states have call successors, (7) [2021-05-02 22:51:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:33,686 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-02 22:51:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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), 3 states have call successors, (7) Word has length 44 [2021-05-02 22:51:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:33,688 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:51:33,688 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 22:51:33,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 22:51:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 22:51:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 22:51:33,694 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 22:51:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:33,695 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 22:51:33,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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), 3 states have call successors, (7) [2021-05-02 22:51:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 22:51:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 22:51:33,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:33,696 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:33,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:33,901 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-02 22:51:33,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:33,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826961926] [2021-05-02 22:51:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:33,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:33,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667004985] [2021-05-02 22:51:33,909 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 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 [2021-05-02 22:51:33,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:34,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:34,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826961926] [2021-05-02 22:51:34,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:34,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667004985] [2021-05-02 22:51:34,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667004985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:34,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:34,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338394791] [2021-05-02 22:51:34,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:34,106 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:34,195 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-02 22:51:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 22:51:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:34,197 INFO L225 Difference]: With dead ends: 68 [2021-05-02 22:51:34,197 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 22:51:34,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 22:51:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 22:51:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:51:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 22:51:34,203 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 22:51:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:34,203 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 22:51:34,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 22:51:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 22:51:34,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:34,205 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:34,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:51:34,429 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-02 22:51:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:34,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627527101] [2021-05-02 22:51:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:34,449 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:34,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169017272] [2021-05-02 22:51:34,449 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 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 [2021-05-02 22:51:34,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 22:51:34,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:51:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 22:51:34,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:34,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627527101] [2021-05-02 22:51:34,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:34,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169017272] [2021-05-02 22:51:34,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169017272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:34,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:34,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091667279] [2021-05-02 22:51:34,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:34,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:34,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:34,701 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-05-02 22:51:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:34,859 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-02 22:51:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:51:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 56 [2021-05-02 22:51:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:34,861 INFO L225 Difference]: With dead ends: 72 [2021-05-02 22:51:34,861 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 22:51:34,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 22:51:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 22:51:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:51:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 22:51:34,866 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 22:51:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:34,867 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 22:51:34,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-05-02 22:51:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 22:51:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:51:34,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:34,868 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:35,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:35,093 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-02 22:51:35,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:35,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835477553] [2021-05-02 22:51:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:35,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:35,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810762512] [2021-05-02 22:51:35,104 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 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 [2021-05-02 22:51:35,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 22:51:35,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:35,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 22:51:35,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:35,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 22:51:35,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:35,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835477553] [2021-05-02 22:51:35,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:35,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810762512] [2021-05-02 22:51:35,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810762512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:35,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:35,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:51:35,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347872845] [2021-05-02 22:51:35,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:51:35,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:51:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:35,451 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:35,619 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-02 22:51:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 22:51:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:35,620 INFO L225 Difference]: With dead ends: 76 [2021-05-02 22:51:35,620 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 22:51:35,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:51:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 22:51:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 22:51:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 22:51:35,626 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 22:51:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:35,626 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 22:51:35,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 22:51:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:51:35,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:35,627 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:35,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:35,851 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-02 22:51:35,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:35,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268509439] [2021-05-02 22:51:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:35,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019947923] [2021-05-02 22:51:35,865 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 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 [2021-05-02 22:51:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 22:51:35,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 22:51:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268509439] [2021-05-02 22:51:36,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019947923] [2021-05-02 22:51:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019947923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:36,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:36,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871652156] [2021-05-02 22:51:36,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:36,139 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:36,237 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-05-02 22:51:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:36,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 22:51:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:36,244 INFO L225 Difference]: With dead ends: 85 [2021-05-02 22:51:36,244 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 22:51:36,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 22:51:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 22:51:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0625) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:51:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 22:51:36,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2021-05-02 22:51:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:36,258 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 22:51:36,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 22:51:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 22:51:36,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:36,261 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:36,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:36,477 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1331766697, now seen corresponding path program 8 times [2021-05-02 22:51:36,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:36,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915089672] [2021-05-02 22:51:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:36,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:36,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432464047] [2021-05-02 22:51:36,484 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 [2021-05-02 22:51:36,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:36,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 22:51:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 22:51:36,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:36,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915089672] [2021-05-02 22:51:36,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:36,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432464047] [2021-05-02 22:51:36,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432464047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:36,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:36,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:51:36,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658915810] [2021-05-02 22:51:36,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:51:36,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:36,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:51:36,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:36,755 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:36,925 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-02 22:51:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-05-02 22:51:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:36,927 INFO L225 Difference]: With dead ends: 89 [2021-05-02 22:51:36,927 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 22:51:36,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:51:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 22:51:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 22:51:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:51:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-05-02 22:51:36,931 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 73 [2021-05-02 22:51:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:36,932 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-05-02 22:51:36,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-05-02 22:51:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 22:51:36,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:36,933 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:37,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:37,149 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash -715048783, now seen corresponding path program 9 times [2021-05-02 22:51:37,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:37,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932410135] [2021-05-02 22:51:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:37,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:37,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387664317] [2021-05-02 22:51:37,156 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 [2021-05-02 22:51:37,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:51:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:37,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:37,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:37,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:37,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,515 WARN L205 SmtUtils]: Spent 8.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 22:51:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-02 22:51:49,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932410135] [2021-05-02 22:51:49,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387664317] [2021-05-02 22:51:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387664317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:49,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:49,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573524221] [2021-05-02 22:51:49,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 22:51:49,581 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:52:20,665 WARN L205 SmtUtils]: Spent 31.07 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 22:52:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:43,961 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-05-02 22:52:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:52:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-02 22:52:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:43,962 INFO L225 Difference]: With dead ends: 100 [2021-05-02 22:52:43,962 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 22:52:43,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43181.2ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 22:52:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 22:52:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 22:52:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:52:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-02 22:52:43,966 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 78 [2021-05-02 22:52:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:43,967 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-02 22:52:43,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:52:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-02 22:52:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 22:52:43,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:43,968 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:44,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:52:44,185 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash -782935442, now seen corresponding path program 10 times [2021-05-02 22:52:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126235623] [2021-05-02 22:52:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:44,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:44,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508467888] [2021-05-02 22:52:44,192 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 [2021-05-02 22:52:44,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:52:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:52:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 22:52:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 22:52:44,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:44,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126235623] [2021-05-02 22:52:44,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:44,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508467888] [2021-05-02 22:52:44,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508467888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:44,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:44,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:52:44,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016197133] [2021-05-02 22:52:44,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:52:44,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:44,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:52:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:52:44,441 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 22:52:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:44,577 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-05-02 22:52:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:52:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 22:52:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:44,579 INFO L225 Difference]: With dead ends: 108 [2021-05-02 22:52:44,579 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 22:52:44,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:52:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 22:52:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 22:52:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 67 states have internal predecessors, (68), 24 states have call successors, (24), 18 states have call predecessors, (24), 17 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:52:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-05-02 22:52:44,585 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 85 [2021-05-02 22:52:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:44,586 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-05-02 22:52:44,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 22:52:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-05-02 22:52:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 22:52:44,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:44,593 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:44,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 22:52:44,814 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1240090109, now seen corresponding path program 11 times [2021-05-02 22:52:44,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:44,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236702447] [2021-05-02 22:52:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:44,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:44,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591047360] [2021-05-02 22:52:44,820 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 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 [2021-05-02 22:52:44,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 22:52:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:52:44,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 22:52:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:44,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 99 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 22:52:45,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236702447] [2021-05-02 22:52:45,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591047360] [2021-05-02 22:52:45,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591047360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:45,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:45,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:52:45,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037712514] [2021-05-02 22:52:45,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:52:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:52:45,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:52:45,194 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 22:52:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:45,456 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-05-02 22:52:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:52:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 90 [2021-05-02 22:52:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:45,457 INFO L225 Difference]: With dead ends: 116 [2021-05-02 22:52:45,457 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 22:52:45,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:52:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 22:52:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 22:52:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 23 states have call successors, (23), 19 states have call predecessors, (23), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:52:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-05-02 22:52:45,461 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 90 [2021-05-02 22:52:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:45,462 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-05-02 22:52:45,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 22:52:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-05-02 22:52:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 22:52:45,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:45,463 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:45,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:52:45,685 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1053719828, now seen corresponding path program 12 times [2021-05-02 22:52:45,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:45,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595711680] [2021-05-02 22:52:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:45,692 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:45,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131111922] [2021-05-02 22:52:45,692 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 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 [2021-05-02 22:52:45,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:52:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:52:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 22:52:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:45,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:45,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 85 proven. 68 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-05-02 22:52:45,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:45,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595711680] [2021-05-02 22:52:45,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:45,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131111922] [2021-05-02 22:52:45,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131111922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:45,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:45,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:52:45,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692535960] [2021-05-02 22:52:45,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:52:45,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:45,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:52:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:52:45,972 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 22:52:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:46,066 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-05-02 22:52:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:52:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2021-05-02 22:52:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:46,069 INFO L225 Difference]: With dead ends: 118 [2021-05-02 22:52:46,069 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 22:52:46,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:52:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 22:52:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-02 22:52:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 23 states have call successors, (23), 21 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:52:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-05-02 22:52:46,076 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 102 [2021-05-02 22:52:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:46,078 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-05-02 22:52:46,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 22:52:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-05-02 22:52:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 22:52:46,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:46,080 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:46,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 22:52:46,297 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2145723625, now seen corresponding path program 13 times [2021-05-02 22:52:46,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:46,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059220478] [2021-05-02 22:52:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:46,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:46,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597251788] [2021-05-02 22:52:46,303 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 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 [2021-05-02 22:52:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:52:46,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 22:52:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 22:52:46,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059220478] [2021-05-02 22:52:46,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597251788] [2021-05-02 22:52:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597251788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:46,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:46,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:52:46,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788052989] [2021-05-02 22:52:46,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:52:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:52:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:52:46,610 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 22:52:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:46,874 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2021-05-02 22:52:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:52:46,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 22:52:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:46,876 INFO L225 Difference]: With dead ends: 133 [2021-05-02 22:52:46,876 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 22:52:46,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:52:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 22:52:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 22:52:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 26 states have call successors, (26), 23 states have call predecessors, (26), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:52:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2021-05-02 22:52:46,880 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 107 [2021-05-02 22:52:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:46,880 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2021-05-02 22:52:46,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 22:52:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2021-05-02 22:52:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 22:52:46,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:46,882 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:47,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:52:47,103 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1331158333, now seen corresponding path program 14 times [2021-05-02 22:52:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:47,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735003730] [2021-05-02 22:52:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:47,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:47,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241078223] [2021-05-02 22:52:47,109 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 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 [2021-05-02 22:52:47,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:52:47,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:52:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 22:52:47,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 37 proven. 148 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 22:52:47,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:47,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735003730] [2021-05-02 22:52:47,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:47,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241078223] [2021-05-02 22:52:47,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241078223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:47,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:47,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:52:47,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467106946] [2021-05-02 22:52:47,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:52:47,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:52:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:52:47,489 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-02 22:52:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:47,844 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2021-05-02 22:52:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:52:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 124 [2021-05-02 22:52:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:47,846 INFO L225 Difference]: With dead ends: 150 [2021-05-02 22:52:47,846 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 22:52:47,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:52:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 22:52:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-05-02 22:52:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 29 states have call successors, (29), 26 states have call predecessors, (29), 25 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:52:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2021-05-02 22:52:47,851 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 124 [2021-05-02 22:52:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2021-05-02 22:52:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-02 22:52:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2021-05-02 22:52:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 22:52:47,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:47,853 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:48,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 22:52:48,065 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:48,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1826182185, now seen corresponding path program 15 times [2021-05-02 22:52:48,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:48,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128158149] [2021-05-02 22:52:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:48,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23957948] [2021-05-02 22:52:48,070 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 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 [2021-05-02 22:52:48,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:52:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:52:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:52:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:48,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:48,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:48,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:48,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:48,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 22:52:48,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:48,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128158149] [2021-05-02 22:52:48,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:48,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23957948] [2021-05-02 22:52:48,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23957948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:48,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:48,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:52:48,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123779091] [2021-05-02 22:52:48,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:52:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:48,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:52:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:52:48,355 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 22:52:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:50,608 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-05-02 22:52:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:52:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 141 [2021-05-02 22:52:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:50,609 INFO L225 Difference]: With dead ends: 146 [2021-05-02 22:52:50,609 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:52:50,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:52:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:52:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:52:50,610 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) [2021-05-02 22:52:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:52:50,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 141 [2021-05-02 22:52:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:50,610 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:52:50,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 22:52:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:52:50,610 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:52:50,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 22:52:50,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:52:50 BasicIcfg [2021-05-02 22:52:50,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:52:50,815 INFO L168 Benchmark]: Toolchain (without parser) took 81348.50 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.4 MB in the beginning and 81.4 MB in the end (delta: 67.0 MB). Peak memory consumption was 104.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory is still 165.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.38 ms. Allocated memory is still 183.5 MB. Free memory was 148.2 MB in the beginning and 138.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L168 Benchmark]: Boogie Preprocessor took 76.05 ms. Allocated memory is still 183.5 MB. Free memory was 138.4 MB in the beginning and 166.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L168 Benchmark]: RCFGBuilder took 356.51 ms. Allocated memory is still 183.5 MB. Free memory was 166.5 MB in the beginning and 152.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L168 Benchmark]: IcfgTransformer took 25.68 ms. Allocated memory is still 183.5 MB. Free memory was 151.8 MB in the beginning and 150.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L168 Benchmark]: TraceAbstraction took 80640.99 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 150.4 MB in the beginning and 81.4 MB in the end (delta: 69.0 MB). Peak memory consumption was 106.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:50,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory is still 165.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 223.38 ms. Allocated memory is still 183.5 MB. Free memory was 148.2 MB in the beginning and 138.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.05 ms. Allocated memory is still 183.5 MB. Free memory was 138.4 MB in the beginning and 166.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.51 ms. Allocated memory is still 183.5 MB. Free memory was 166.5 MB in the beginning and 152.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 25.68 ms. Allocated memory is still 183.5 MB. Free memory was 151.8 MB in the beginning and 150.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 80640.99 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 150.4 MB in the beginning and 81.4 MB in the end (delta: 69.0 MB). Peak memory consumption was 106.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 80594.9ms, OverallIterations: 18, TraceHistogramMax: 23, EmptinessCheckTime: 31.6ms, AutomataDifference: 59683.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 587 SDtfs, 218 SDslu, 2928 SDs, 0 SdLazy, 2728 SolverSat, 244 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 27282.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1211 GetRequests, 1047 SyntacticMatches, 9 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 44646.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=17, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 129.1ms AutomataMinimizationTime, 18 MinimizatonAttempts, 12 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 145.7ms SsaConstructionTime, 602.6ms SatisfiabilityAnalysisTime, 15737.0ms InterpolantComputationTime, 1209 NumberOfCodeBlocks, 1017 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1191 ConstructedInterpolants, 0 QuantifiedInterpolants, 3751 SizeOfPredicates, 56 NumberOfNonLiveVariables, 3029 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 4194/4820 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...